Yesterday 50 customers at a bakery bought muffins. Twelve of those muffins were blueberry. Today, if 75 customers buy muffins, how many of the muffins would you expect to be blueberry?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?