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Finding the Third Proportional to 31,809 and 47,718

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Solution

The third proportional to 31,809 and 47,718 is: 71,583.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,809 : 47,718 = 47,718 : x
  2. Step 2: Convert to fraction form
    31,809/47,718 = 47,718/x
  3. Step 3: Cross multiply
    31,809x = 47,718 × 47,718
  4. Step 4: Simplify right side
    31,809x = 2,277,007,524
  5. Step 5: Solve for x
    x = 2,277,007,524/31,809
  6. Step 6: Final answer
    x = 71,583.75

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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.