Answer
$144
Work Step by Step
Create a proportion using ratios of cost:yardage.
$\frac{\$120}{75\ yd}=\frac{\$x}{90\ yd}$
Set the product of the means equal to the product of the extremes and solve for the variable.
$75\times x=120\times 90$
$75x=10800$
$75x\div75=10800\div75$
$x=144$
