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Finding the Third Proportional to 81,489 and 126,073

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Solution

The third proportional to 81,489 and 126,073 is: 195,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,489 : 126,073 = 126,073 : x
  2. Step 2: Convert to fraction form
    81,489/126,073 = 126,073/x
  3. Step 3: Cross multiply
    81,489x = 126,073 × 126,073
  4. Step 4: Simplify right side
    81,489x = 15,894,401,329
  5. Step 5: Solve for x
    x = 15,894,401,329/81,489
  6. Step 6: Final answer
    x = 195,049.65

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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.