Finding the Fourth Proportional to 86,206,938.80, 129,310,408.20 and 76,853,577.20
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Solution
The fourth proportional to 86,206,938.80, 129,310,408.20 and 76,853,577.20 is: 115,280,365.80
Step by Step Solution
- Step 1: Write the proportion equation
86,206,938.80 : 129,310,408.20 = 76,853,577.20 : x - Step 2: Convert to fraction form
86,206,938.80/129,310,408.20 = 76,853,577.20/x - Step 3: Cross multiply
86,206,938.80x = 129,310,408.20 × 76,853,577.20 - Step 4: Simplify right side
86,206,938.80x = 9,937,967,439,362,214 - Step 5: Solve for x
x = 9,937,967,439,362,214/86,206,938.80 - Step 6: Final answer
x = 115,280,365.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.