6 feet
Explanation
Step 1
then, we have 2 similar trianlges,
as the triangles are similare, the proportion of their sides must be the same, so
[tex]\begin{gathered} \frac{136}{34}=\frac{h}{1.5} \\ Multipl\text{y both sides by 1.5} \\ \frac{136}{34}\cdot1.5=\frac{h}{1.5}\cdot1.5 \\ \frac{204}{34}=h \\ h=6 \end{gathered}[/tex]Hence, the man is 6 feet tall
I hope this helps you