Answer: The farmer has 120 acres total.
Step-by-step explanation: To get this answer you have to cross multiply and divide. So make two fraction like things right next to each other with an equal sign in the middle. The first fraction like thing your going to put is going to have 72 on the top and your going to leave the bottom blank. For the second fraction like thing you are going to put 60 on top and 100 on the bottom. Next you will multiply 72 by 100, and with that answer you will divide it by 100. Then the answer to that is what goes into that first fractions bottom slot. That answer in the bottom slot is your number of acres total.