Step 1:Write what you know Madeline's Height: 6 ftMadeline's Shadow: 108 in Friend's Height: X (we use X as a variable because his height is unknown)Friend's Shadow: 108 in - 1.5 ft 108 in - 18 in 90 in Step 2:Set up proportions 6 x----- = -----108 90 Step 3:Cross Multiply & Solve 108x = 540x = 5 ft tall
