Suppose we know that when price is 10, earnings (per share) is 2, then P/E is 5; and thus when P/E reaches 20 under the same earning, the theoretic price will be 40, as P/E*E=P

Now given the price and dividend, a function, D/(P+lnP), is 9.27%. We want to know what the price will be when D/(P+lnP) is X%, like 5%, as seen on the attachment file.

In this case, there's no mathematical way to re-formulate D/(P+lnP)=constant in terms of P. Given a simple excel, we have to use the "goal seeking" tool.

Goal cell $C$2

Goal value 0.05

Variable cell A2

But we couldn't keep using the goal seeking one by one if we have thousands of calculations.

Now what should be done to achieve the goal of calculation in Excel?

Any help would be much appreciated.

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