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Finding the Third Proportional to 138,780 and 299,166.75

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Solution

The third proportional to 138,780 and 299,166.75 is: 644,910.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,780 : 299,166.75 = 299,166.75 : x
  2. Step 2: Convert to fraction form
    138,780/299,166.75 = 299,166.75/x
  3. Step 3: Cross multiply
    138,780x = 299,166.75 × 299,166.75
  4. Step 4: Simplify right side
    138,780x = 89,500,744,305.56
  5. Step 5: Solve for x
    x = 89,500,744,305.56/138,780
  6. Step 6: Final answer
    x = 644,910.97

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.