Answer:
Based on the information provided, it is not possible to determine the proportion of the balancing authority's tie line bias ACE (Area Control Error) equation that a Pseudo-Tie is entered into. The question does not provide any specific data or context regarding the equation or the involvement of a Pseudo-Tie.
To accurately determine the proportion, you would need more information about the specific equation and the role of a Pseudo-Tie within it. Without this information, it is not possible to provide an accurate answer.
Explanation: