Good day, and thank you for standing by, and welcome to the Fiscal 2021 Q4 Earnings Call. At this time, all participants are in a listen only mode. Please be advised that today's conference is being recorded. I would now like to hand the conference over to your speaker today, James E. Farrell, Chief Executive Officer and President.
Please go ahead.
Thank you, and good morning to all. My name is Jim Farrell, proud representative of 4,500 men and women who make this company work. As I look back at the year that ended on July 31, it was one of the most remarkable in the company's long history. Learning to deal with new technology, dashboards and metrics is not easy, especially when the need to restructure our balance sheet created uncertainty regarding our future. Saying I am proud of our managing financial results during a time like this is an understatement.
As a result of the restructuring, the most portion of our capital structure is now Class B units. Our financial performance allowed us to make a distribution a couple of weeks ago to the B units of $49,900,000 or 38 $0.46 per Class B unit, beginning a multiyear process Reducing our cost of capital and therefore, increasing the value of the common equity on which There are 2 other officers on this call, and I am first pleased To introduce our new Chief Financial Officer, Dheeraj Chirian. He joins us from Sonic, an automotive systems company, and brings with him more than 20 years of strategic, financial and operational achievements. We are very excited to welcome him on board. The other person is our Chief Operating Officer.
Tamria Zertucci is not new to Ferrellgas, but is the architect of our transformation. Tamarina is the primary reason for our great financial performance, and she was very instrumental In our restructuring, together, we were able to restructure the balance sheet while transforming an old company into an exceptionally modern logistics Organization, with more to come, I will let her fill in with the ops report and M and A After now handing the call over to Dheeraj Chirian.
Thank you, Jim, And welcome to our Q4 2021 earnings call. Thank you all for joining us. I'd like to remind all of View that some statements made during this call may be considered forward looking and that various risks, uncertainties and other factors could cause Actual performance to differ materially from anticipated performance. These factors are discussed in our Form 10 ks filed last week and other documents filed from time to time with the Securities and Exchange Commission. Additionally, we note that the purpose of this Call is to discuss the results of operations for the 4th fiscal quarter and full year ended July 31, 2021.
The company's strong performance continued during the Q4 of fiscal 2021, leading to a $67,600,000 increase in operating income for the fiscal year. The gallons of propane sold for the Quarter were $147,000,000 compared to $141,500,000 in the prior year quarter or a $5,500,000 increase. Blue Rhino tank exchange sales continue to increase due to Further market share penetration, national marketing strategies and continued growth in backyard and outdoor appliance usage. Also contributing to a strong gallon performance are right time deliveries that shifted gallons into this quarter and additional marketing on key consumer platforms. This has resulted in a $5,700,000 increase in gross margin dollars or 4% higher than the prior year quarter.
Highlighting the company's delivery efficiency strategies in response to increased volumes, operating expenses decreased by 11% when compared to the same quarter of last year. For the quarter, the net loss attributable to Ferrellgas Partners LP was $18,800,000 or $7.13 per Class A unit. Compared to the prior year quarter, net loss of $70,000,000 or 14.26 dollars per Class A unit. Adjusted EBITDA, a non GAAP measure, decreased by $2,600,000 or 9.6% compared to the prior year quarter. For the 4th quarter, Adjusted EBITDA was $24,100,000 compared to $26,700,000 in last year's quarter.
For the fiscal year, the net loss attributable to Ferrellgas Partners LP was $68,400,000 or $18.09 per Class A unit compared to the prior fiscal year's net loss of $82,500,000 or $16.08 per Class A unit, a decrease of 12%. The fiscal year's loss is primarily attributable to the $104,800,000 of loss on extinguishment of debt incurred through our successful restructuring transactions as compared to $37,400,000 in the prior fiscal year. Adjusted EBITDA, a non GAAP measure, increased by $52,600,000 or 20% compared to the prior year. Adjusted EBITDA was $318,100,000 compared to $265,500,000 in the last fiscal year. And now, I will hand over to Tamria to speak to our operations.
Thank you, Dheeraj. The financial restructuring process we underwent in the Q3 has allowed us to continue growing by M and A. During July, we added Profane to the Ferrellgas family. Profane has operations in Long Island and will strengthen our position in this area for years to come. Our retail and hand exchange businesses Continue to grow.
We have strategically added to our customer base with new locations that positively impact our route density. In addition, we have expanded our tank exchange home delivery operations to 12 markets across the United States. The keys to our success lie in our employees and having a strong operations team across the country. Additionally, our management development program created last year continues to thrive. The 3rd class of 22 candidates from across the country will be graduating next month with a new class starting in early 2022.
Also during the last quarter, we fostered an internship program in which 5 undergraduate students worked in supply We partnered with Operation Barbecue Relief to provide support to those areas most impacted in Southern United States. Next, a Q and A section. In an effort to provide more transparency, we will address a few questions that we received over the last Some are operational in nature. Therefore, I will address those first. The first question, Would you discuss the recent acquisition and outlook for future acquisitions?
The company has long been considered a leader The successful capital restructuring allows us to be an active participant in acquisition activity. The next question is Ferrogas seeing signs of demand destruction via conservation due to high propane pricing. We are a technology enabled logistics company And these capabilities, when paired with the pass through pricing structure known throughout our industry, create a good formula in times of higher propane pricing. Currently, we are not forecasting demand destruction due to higher propane pricing. The next question, why were 4th Quarter wholesale volumes down year over year.
We attribute this decrease to external supply chain disruptions, mostly in the steel market, Our improved delivery efficiencies continuing to push deliveries to the right time and better asset utilization. The next question, What drove decline in customers in the 4th quarter? Improved asset utilization created this Point in time decrease for this measurement, expected to be just this 4th quarter measurement. I will now hand over to Jim to speak to the last question.
Thanks, Kim Maria. The question has to do with discussing the $79,000,000 broker margin deposit liability listed on the 10 ks. This is not a speculating position. This is a hedge to backstop our fixed price program we call Platinum Plus For the fiscal year 2022 heating season, let me also say here that We do expect to perform. Now I'll turn the call back Before I do that, as mentioned in the announcement for the call, any additional questions may be submitted via our Investor Relations e mail box at investorrelationsferrellgas.com.
Thank you all very much for attending our fiscal year end earnings call. Once again, we are very proud of our performance