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Finding the Third Proportional to 31,338 and 68,484

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Solution

The third proportional to 31,338 and 68,484 is: 149,660.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,338 : 68,484 = 68,484 : x
  2. Step 2: Convert to fraction form
    31,338/68,484 = 68,484/x
  3. Step 3: Cross multiply
    31,338x = 68,484 × 68,484
  4. Step 4: Simplify right side
    31,338x = 4,690,058,256
  5. Step 5: Solve for x
    x = 4,690,058,256/31,338
  6. Step 6: Final answer
    x = 149,660.42

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.