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Finding the Third Proportional to 77,715 and 139,439

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Solution

The third proportional to 77,715 and 139,439 is: 250,186.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,715 : 139,439 = 139,439 : x
  2. Step 2: Convert to fraction form
    77,715/139,439 = 139,439/x
  3. Step 3: Cross multiply
    77,715x = 139,439 × 139,439
  4. Step 4: Simplify right side
    77,715x = 19,443,234,721
  5. Step 5: Solve for x
    x = 19,443,234,721/77,715
  6. Step 6: Final answer
    x = 250,186.38

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.