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Finding the Third Proportional to 61,207 and 129,761

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Solution

The third proportional to 61,207 and 129,761 is: 275,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,207 : 129,761 = 129,761 : x
  2. Step 2: Convert to fraction form
    61,207/129,761 = 129,761/x
  3. Step 3: Cross multiply
    61,207x = 129,761 × 129,761
  4. Step 4: Simplify right side
    61,207x = 16,837,917,121
  5. Step 5: Solve for x
    x = 16,837,917,121/61,207
  6. Step 6: Final answer
    x = 275,097.90

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.