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Finding the Third Proportional to 84,231 and 126,217

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Solution

The third proportional to 84,231 and 126,217 is: 189,131.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,231 : 126,217 = 126,217 : x
  2. Step 2: Convert to fraction form
    84,231/126,217 = 126,217/x
  3. Step 3: Cross multiply
    84,231x = 126,217 × 126,217
  4. Step 4: Simplify right side
    84,231x = 15,930,731,089
  5. Step 5: Solve for x
    x = 15,930,731,089/84,231
  6. Step 6: Final answer
    x = 189,131.45

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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.