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Finding the Third Proportional to 91,449 and 121,374

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Solution

The third proportional to 91,449 and 121,374 is: 161,091.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,449 : 121,374 = 121,374 : x
  2. Step 2: Convert to fraction form
    91,449/121,374 = 121,374/x
  3. Step 3: Cross multiply
    91,449x = 121,374 × 121,374
  4. Step 4: Simplify right side
    91,449x = 14,731,647,876
  5. Step 5: Solve for x
    x = 14,731,647,876/91,449
  6. Step 6: Final answer
    x = 161,091.40

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.