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Finding the Third Proportional to 31,839 and 47,748

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Solution

The third proportional to 31,839 and 47,748 is: 71,606.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,839 : 47,748 = 47,748 : x
  2. Step 2: Convert to fraction form
    31,839/47,748 = 47,748/x
  3. Step 3: Cross multiply
    31,839x = 47,748 × 47,748
  4. Step 4: Simplify right side
    31,839x = 2,279,871,504
  5. Step 5: Solve for x
    x = 2,279,871,504/31,839
  6. Step 6: Final answer
    x = 71,606.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.