You will have to define 'larger' a bit more clearly. Do you mean 25 times the diameter? 25 times the volume? 25 times the mass? 25 times the surface area?
Choose one of these, and we can try to figure something out.
But to get an Earth-like gravity on such a big world would require that the planet either has a very low density- practically no more than a gas giant-
or the planet must spin very fast, so that the centrifugal force at the equator counteracts the pull of gravity from the plant's mass.
Mesklin is a famous example in fiction of the second type of world; but I doubt that such a world would exist in real life.
http://en.wikipedia.org/wiki/Mesklin