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Finding the Third Proportional to 61,479 and 135,900

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Solution

The third proportional to 61,479 and 135,900 is: 300,408.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,479 : 135,900 = 135,900 : x
  2. Step 2: Convert to fraction form
    61,479/135,900 = 135,900/x
  3. Step 3: Cross multiply
    61,479x = 135,900 × 135,900
  4. Step 4: Simplify right side
    61,479x = 18,468,810,000
  5. Step 5: Solve for x
    x = 18,468,810,000/61,479
  6. Step 6: Final answer
    x = 300,408.43

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.