Express the Statement as a Formula and Use the Information $Z$

Essay

Express the statement as a formula and use the information to find the constant of proportionality: $Z$ is jointly proportional to $a$ , $b$ , and $c$ and inversely proportional to $d$ . If $c$ and $d$ have the same value, and if $a$ and $b$ are both $6$ , then $Z = 360$ .