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Finding the Third Proportional to 54,390 and 81,534

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Solution

The third proportional to 54,390 and 81,534 is: 122,224.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,390 : 81,534 = 81,534 : x
  2. Step 2: Convert to fraction form
    54,390/81,534 = 81,534/x
  3. Step 3: Cross multiply
    54,390x = 81,534 × 81,534
  4. Step 4: Simplify right side
    54,390x = 6,647,793,156
  5. Step 5: Solve for x
    x = 6,647,793,156/54,390
  6. Step 6: Final answer
    x = 122,224.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.