Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 34

x=80.5

Set the product of the means equal to the product of the extremes and solve for the variable. $67\times149=124\times x$ $9983=124x$ $9983\div124=124x\div124$ $80.\underset\uparrow50806=x$ Since the digit to the right of the 3rd significant digit is less than 5, round down.