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Finding the Third Proportional to 61,984 and 131,720

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Solution

The third proportional to 61,984 and 131,720 is: 279,913.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,984 : 131,720 = 131,720 : x
  2. Step 2: Convert to fraction form
    61,984/131,720 = 131,720/x
  3. Step 3: Cross multiply
    61,984x = 131,720 × 131,720
  4. Step 4: Simplify right side
    61,984x = 17,350,158,400
  5. Step 5: Solve for x
    x = 17,350,158,400/61,984
  6. Step 6: Final answer
    x = 279,913.50

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.