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Finding the Third Proportional to 89,747 and 138,948

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Solution

The third proportional to 89,747 and 138,948 is: 215,121.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,747 : 138,948 = 138,948 : x
  2. Step 2: Convert to fraction form
    89,747/138,948 = 138,948/x
  3. Step 3: Cross multiply
    89,747x = 138,948 × 138,948
  4. Step 4: Simplify right side
    89,747x = 19,306,546,704
  5. Step 5: Solve for x
    x = 19,306,546,704/89,747
  6. Step 6: Final answer
    x = 215,121.92

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.