\[4,\ 8,\ 12,\ \ldots 180.\ \ \ \]
\[d = 4;\ \ \]
\[a_{n} = a_{1} + d(n - 1)\]
\[4 + 4 \cdot (n - 1) = 180\]
\[4n = 180\]
\[n = \frac{180}{4} = 45.\]
\[S_{45} = \frac{4 + 180}{2} \cdot 45 =\]
\[= 92 \cdot 45 = 4140.\]
\[Ответ:4140.\]