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Finding the Third Proportional to 54,990 and 82,287

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Solution

The third proportional to 54,990 and 82,287 is: 123,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,990 : 82,287 = 82,287 : x
  2. Step 2: Convert to fraction form
    54,990/82,287 = 82,287/x
  3. Step 3: Cross multiply
    54,990x = 82,287 × 82,287
  4. Step 4: Simplify right side
    54,990x = 6,771,150,369
  5. Step 5: Solve for x
    x = 6,771,150,369/54,990
  6. Step 6: Final answer
    x = 123,134.21

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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.