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Finding the Third Proportional to 109,890 and 125,442

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Solution

The third proportional to 109,890 and 125,442 is: 143,194.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,890 : 125,442 = 125,442 : x
  2. Step 2: Convert to fraction form
    109,890/125,442 = 125,442/x
  3. Step 3: Cross multiply
    109,890x = 125,442 × 125,442
  4. Step 4: Simplify right side
    109,890x = 15,735,695,364
  5. Step 5: Solve for x
    x = 15,735,695,364/109,890
  6. Step 6: Final answer
    x = 143,194.97

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.