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Finding the Third Proportional to 138,838 and 207,663

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Solution

The third proportional to 138,838 and 207,663 is: 310,606.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,838 : 207,663 = 207,663 : x
  2. Step 2: Convert to fraction form
    138,838/207,663 = 207,663/x
  3. Step 3: Cross multiply
    138,838x = 207,663 × 207,663
  4. Step 4: Simplify right side
    138,838x = 43,123,921,569
  5. Step 5: Solve for x
    x = 43,123,921,569/138,838
  6. Step 6: Final answer
    x = 310,606.04

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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.