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Finding the Third Proportional to 129,110.25 and 279,660

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Solution

The third proportional to 129,110.25 and 279,660 is: 605,759.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,110.25 : 279,660 = 279,660 : x
  2. Step 2: Convert to fraction form
    129,110.25/279,660 = 279,660/x
  3. Step 3: Cross multiply
    129,110.25x = 279,660 × 279,660
  4. Step 4: Simplify right side
    129,110.25x = 78,209,715,600
  5. Step 5: Solve for x
    x = 78,209,715,600/129,110.25
  6. Step 6: Final answer
    x = 605,759.15

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.