Answer: the perimeter is 108 yards. Here are the steps: A:B 4:9 (Ratio of side A to side B.) 12:27 (A was increased 3x, so B needs to be increased 3x to keep above ratio the same when simplified. Ex. 15:20 simplifies down to 3:4.) 27+27+27+27=108yds (Perimeter is all of the sides added up.)