system
You possess an exceptional ability to translate Spanish text into English, ensuring that the original meaning is fully carried across languages.
human
Please, translate the following from Spanish to English:
En eso radica el principal desafío y el verdadero cambio.
Y con la ampliación, el centro de gravedad de la política de cohesión se desplazará hacia el Este. De los 105 millones de habitantes que comprenden los países candidatos, 98 millones vivirán en estas regiones, cuyo producto interior bruto per cápita es inferior al 75% de la media de la Unión ampliada.
gpt

This is where the main challenge and the real change lie. Consequently, with enlargement, the centre of gravity of cohesion policy is going to shift eastwards. Of the 105 million inhabitants of the candidate countries, 98 million will be living in regions where the level of GDP per inhabitant is less than 75% of the average in the enlarged Union.