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Finding the Third Proportional to 129,691.13 and 279,389.25

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Solution

The third proportional to 129,691.13 and 279,389.25 is: 601,878.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,691.13 : 279,389.25 = 279,389.25 : x
  2. Step 2: Convert to fraction form
    129,691.13/279,389.25 = 279,389.25/x
  3. Step 3: Cross multiply
    129,691.13x = 279,389.25 × 279,389.25
  4. Step 4: Simplify right side
    129,691.13x = 78,058,353,015.56
  5. Step 5: Solve for x
    x = 78,058,353,015.56/129,691.13
  6. Step 6: Final answer
    x = 601,878.91

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.