Finding the Fourth Proportional to 642,068,331.20, 963,102,496.80 and 157,394,139.20
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Solution
The fourth proportional to 642,068,331.20, 963,102,496.80 and 157,394,139.20 is: 236,091,208.80
Step by Step Solution
- Step 1: Write the proportion equation
642,068,331.20 : 963,102,496.80 = 157,394,139.20 : x - Step 2: Convert to fraction form
642,068,331.20/963,102,496.80 = 157,394,139.20/x - Step 3: Cross multiply
642,068,331.20x = 963,102,496.80 × 157,394,139.20 - Step 4: Simplify right side
642,068,331.20x = 151,586,688,445,206,720 - Step 5: Solve for x
x = 151,586,688,445,206,720/642,068,331.20 - Step 6: Final answer
x = 236,091,208.80
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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.