Following numerous studies by SEOs in recent years, the following PageRank equation has been developed for calculating the PageRank inheritance:

PR(A) = (1 – d) + d (PR(T1) / C(T1) + ... + PR(Tn) / C(Tn))PR(A): PageRank of page Ad = 0.85PR(Ti): PageRank of page T1, which sets a link to AC(Ti): Number of outbound links on page T1, which inherits the PageRank

Since Google has not confirmed this equation, there may by all means be differences in the actual calculation. However, it is indisputable that the number of outbound external backlinks on a webpage is a very important factor. The more external backlinks it has, the weaker the inheritance. It is possible that pages with a great amount of external links (including link exchanges) may be entirely excluded from a PageRank inheritance by Google, however this cannot be reliably determined.

Please note: Search engine optimization does not mean attaining a high PageRank as quickly as possible. The importance of the PageRank is steadily decreasing. You must pay particular attention to having a natural growth of links and acquiring content relevant links.