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Finding the Third Proportional to 54,020 and 81,775

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Solution

The third proportional to 54,020 and 81,775 is: 123,790.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,020 : 81,775 = 81,775 : x
  2. Step 2: Convert to fraction form
    54,020/81,775 = 81,775/x
  3. Step 3: Cross multiply
    54,020x = 81,775 × 81,775
  4. Step 4: Simplify right side
    54,020x = 6,687,150,625
  5. Step 5: Solve for x
    x = 6,687,150,625/54,020
  6. Step 6: Final answer
    x = 123,790.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.