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Finding the Third Proportional to 38,917 and 75,890

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Solution

The third proportional to 38,917 and 75,890 is: 147,989.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,917 : 75,890 = 75,890 : x
  2. Step 2: Convert to fraction form
    38,917/75,890 = 75,890/x
  3. Step 3: Cross multiply
    38,917x = 75,890 × 75,890
  4. Step 4: Simplify right side
    38,917x = 5,759,292,100
  5. Step 5: Solve for x
    x = 5,759,292,100/38,917
  6. Step 6: Final answer
    x = 147,989.11

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Why These Related Problems?

These problems maintain the same ratio (1.95) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.