## Elementary Algebra

$B=108$
Substituting $V=432$ and $h=12$ into the formula and solving, we obtain: $V=\frac{1}{3}Bh$ $432=\frac{1}{3}\times B\times(12)$ $432=\frac{1}{1}\times B\times4$ $432=4B$ $B=\frac{432}{4}$ $B=108$