Finding the Fourth Proportional to 138,438,207.90, 207,657,311.85 and 138,438,207.90
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Solution
The fourth proportional to 138,438,207.90, 207,657,311.85 and 138,438,207.90 is: 207,657,311.85
Step by Step Solution
- Step 1: Write the proportion equation
138,438,207.90 : 207,657,311.85 = 138,438,207.90 : x - Step 2: Convert to fraction form
138,438,207.90/207,657,311.85 = 138,438,207.90/x - Step 3: Cross multiply
138,438,207.90x = 207,657,311.85 × 138,438,207.90 - Step 4: Simplify right side
138,438,207.90x = 28,747,706,109,845,436 - Step 5: Solve for x
x = 28,747,706,109,845,436/138,438,207.90 - Step 6: Final answer
x = 207,657,311.85
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Similar ratio
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1.5x scale
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.