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Finding the Third Proportional to 77,608,328 and 129,339,468

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Solution

The third proportional to 77,608,328 and 129,339,468 is: 215,552,871.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,608,328 : 129,339,468 = 129,339,468 : x
  2. Step 2: Convert to fraction form
    77,608,328/129,339,468 = 129,339,468/x
  3. Step 3: Cross multiply
    77,608,328x = 129,339,468 × 129,339,468
  4. Step 4: Simplify right side
    77,608,328x = 16,728,697,982,523,024
  5. Step 5: Solve for x
    x = 16,728,697,982,523,024/77,608,328
  6. Step 6: Final answer
    x = 215,552,871.88

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.