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Finding the Third Proportional to 31,472 and 66,544

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Solution

The third proportional to 31,472 and 66,544 is: 140,699.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,472 : 66,544 = 66,544 : x
  2. Step 2: Convert to fraction form
    31,472/66,544 = 66,544/x
  3. Step 3: Cross multiply
    31,472x = 66,544 × 66,544
  4. Step 4: Simplify right side
    31,472x = 4,428,103,936
  5. Step 5: Solve for x
    x = 4,428,103,936/31,472
  6. Step 6: Final answer
    x = 140,699.79

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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.