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Finding the Third Proportional to 31,538 and 47,439

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Solution

The third proportional to 31,538 and 47,439 is: 71,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,538 : 47,439 = 47,439 : x
  2. Step 2: Convert to fraction form
    31,538/47,439 = 47,439/x
  3. Step 3: Cross multiply
    31,538x = 47,439 × 47,439
  4. Step 4: Simplify right side
    31,538x = 2,250,458,721
  5. Step 5: Solve for x
    x = 2,250,458,721/31,538
  6. Step 6: Final answer
    x = 71,357.05

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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.