Wyoming is about 3.8 times smaller than Tanzania.

Tanzania is approximately 947,300 sq km, while Wyoming is approximately 251,489 sq km, making Wyoming 26.55% the size of Tanzania. Meanwhile, the population of Tanzania is ~63.9 million people (63.3 million fewer people live in Wyoming).
Tip: This to-scale comparison of Tanzania vs. Wyoming uses the Mercator projection, which distorts the size of regions near the poles.