The volume of a pyramid is given by the formula:
\[ V_{pyramid} = \frac{1}{3} \times B \times h \]
where \( B \) is the area of the base and \( h \) is the height. For a prism with the same base and height, the volume is given by:
\[ V_{prism} = B \times h \]
Since the base areas and heights are the same, we can relate the volumes of the pyramid and prism:
\[ V_{prism} = 3 \times V_{pyramid} \]
Given that the volume of the pyramid is \( 48 , \text{in}^3 \):
\[ V_{prism} = 3 \times 48 , \text{in}^3 = 144 , \text{in}^3 \]
Therefore, the volume of the prism is:
\[ \boxed{144 , \text{in}^3} \]