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Finding the Third Proportional to 54,938 and 82,421

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Solution

The third proportional to 54,938 and 82,421 is: 123,652.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,938 : 82,421 = 82,421 : x
  2. Step 2: Convert to fraction form
    54,938/82,421 = 82,421/x
  3. Step 3: Cross multiply
    54,938x = 82,421 × 82,421
  4. Step 4: Simplify right side
    54,938x = 6,793,221,241
  5. Step 5: Solve for x
    x = 6,793,221,241/54,938
  6. Step 6: Final answer
    x = 123,652.50

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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.