Finding the Fourth Proportional to 138,398,082.70, 207,455,406.45 and 80,860,737.10
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Solution
The fourth proportional to 138,398,082.70, 207,455,406.45 and 80,860,737.10 is: 121,208,305.45
Step by Step Solution
- Step 1: Write the proportion equation
138,398,082.70 : 207,455,406.45 = 80,860,737.10 : x - Step 2: Convert to fraction form
138,398,082.70/207,455,406.45 = 80,860,737.10/x - Step 3: Cross multiply
138,398,082.70x = 207,455,406.45 × 80,860,737.10 - Step 4: Simplify right side
138,398,082.70x = 16,774,997,080,927,092 - Step 5: Solve for x
x = 16,774,997,080,927,092/138,398,082.70 - Step 6: Final answer
x = 121,208,305.45
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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.