To convert yards to inches, you can use the conversion factor that 1 yard is equal to 36 inches.
So, to convert 4.5 yards to inches:
\[ 4.5 , \text{yd} \times 36 , \text{in/yd} = 162 , \text{in} \]
Therefore, \( 4.5 , \text{yd} = 162 , \text{in} \).
The correct answer is 162.