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Finding the Third Proportional to 39,699 and 54,432

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Solution

The third proportional to 39,699 and 54,432 is: 74,632.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,699 : 54,432 = 54,432 : x
  2. Step 2: Convert to fraction form
    39,699/54,432 = 54,432/x
  3. Step 3: Cross multiply
    39,699x = 54,432 × 54,432
  4. Step 4: Simplify right side
    39,699x = 2,962,842,624
  5. Step 5: Solve for x
    x = 2,962,842,624/39,699
  6. Step 6: Final answer
    x = 74,632.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.