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Finding the Third Proportional to 38,981 and 85,906

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Solution

The third proportional to 38,981 and 85,906 is: 189,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,981 : 85,906 = 85,906 : x
  2. Step 2: Convert to fraction form
    38,981/85,906 = 85,906/x
  3. Step 3: Cross multiply
    38,981x = 85,906 × 85,906
  4. Step 4: Simplify right side
    38,981x = 7,379,840,836
  5. Step 5: Solve for x
    x = 7,379,840,836/38,981
  6. Step 6: Final answer
    x = 189,318.92

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.