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Finding the Third Proportional to 90,420 and 141,134

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Solution

The third proportional to 90,420 and 141,134 is: 220,292.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,420 : 141,134 = 141,134 : x
  2. Step 2: Convert to fraction form
    90,420/141,134 = 141,134/x
  3. Step 3: Cross multiply
    90,420x = 141,134 × 141,134
  4. Step 4: Simplify right side
    90,420x = 19,918,805,956
  5. Step 5: Solve for x
    x = 19,918,805,956/90,420
  6. Step 6: Final answer
    x = 220,292.04

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.