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Finding the Third Proportional to 126,787 and 189,781

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Solution

The third proportional to 126,787 and 189,781 is: 284,073.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,787 : 189,781 = 189,781 : x
  2. Step 2: Convert to fraction form
    126,787/189,781 = 189,781/x
  3. Step 3: Cross multiply
    126,787x = 189,781 × 189,781
  4. Step 4: Simplify right side
    126,787x = 36,016,827,961
  5. Step 5: Solve for x
    x = 36,016,827,961/126,787
  6. Step 6: Final answer
    x = 284,073.51

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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.