Finding the Fourth Proportional to 98,711,041.48, 136,363,130.66 and 78,838,715.95
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Solution
The fourth proportional to 98,711,041.48, 136,363,130.66 and 78,838,715.95 is: 108,910,755.70
Step by Step Solution
- Step 1: Write the proportion equation
98,711,041.48 : 136,363,130.66 = 78,838,715.95 : x - Step 2: Convert to fraction form
98,711,041.48/136,363,130.66 = 78,838,715.95/x - Step 3: Cross multiply
98,711,041.48x = 136,363,130.66 × 78,838,715.95 - Step 4: Simplify right side
98,711,041.48x = 10,750,694,123,421,376 - Step 5: Solve for x
x = 10,750,694,123,421,376/98,711,041.48 - Step 6: Final answer
x = 108,910,755.70
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.