There are 100000 micrometers per meters how many meter is 48000?

4.8x10^-2 meters, also written 0.048 meters.

"There are 100000 micrometers per meter"

Incorrect. There are 10^6 micrometers, or one million (1,000,000) in one meter.

"How many meters are 48000 micrometers?

Use the factor label method. First we must write the original number, preferably in scientific notation for large or small numbers:

4.8x10^4µm

Next, include the proportions which the units are with each other. Make sure that the unit that you want to convert, micrometers, in this case, can cancel with the one in this proportion. There are 10^6 micrometers in one meter. We will write this 1m/10^6µm. The micrometers will cancel, leaving us with the desired unit, meters,

4.8x10^4µm x 1m/10^6µm = 4.8x10^-2 m

This can also be written as 0.048 meters.