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Finding the Third Proportional to 38,486 and 57,981

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Solution

The third proportional to 38,486 and 57,981 is: 87,351.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,486 : 57,981 = 57,981 : x
  2. Step 2: Convert to fraction form
    38,486/57,981 = 57,981/x
  3. Step 3: Cross multiply
    38,486x = 57,981 × 57,981
  4. Step 4: Simplify right side
    38,486x = 3,361,796,361
  5. Step 5: Solve for x
    x = 3,361,796,361/38,486
  6. Step 6: Final answer
    x = 87,351.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.