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Finding the Third Proportional to 31,493 and 66,540

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Solution

The third proportional to 31,493 and 66,540 is: 140,589.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,493 : 66,540 = 66,540 : x
  2. Step 2: Convert to fraction form
    31,493/66,540 = 66,540/x
  3. Step 3: Cross multiply
    31,493x = 66,540 × 66,540
  4. Step 4: Simplify right side
    31,493x = 4,427,571,600
  5. Step 5: Solve for x
    x = 4,427,571,600/31,493
  6. Step 6: Final answer
    x = 140,589.07

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.