52 = 46.67

Well you know, that has something to do with the relativity theory.

As you certainly know, Google Earth is based on satelite technology.
And these satelites are flying dam fast, That is where time dilatation comes into the game.
Distance, speed and time being unseparable we therefore have some side effects in GE regarding the distances.
It is also affecting the time and speed but this we cannot notice in GE.