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Finding the Third Proportional to 39,432 and 87,612

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Solution

The third proportional to 39,432 and 87,612 is: 194,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,432 : 87,612 = 87,612 : x
  2. Step 2: Convert to fraction form
    39,432/87,612 = 87,612/x
  3. Step 3: Cross multiply
    39,432x = 87,612 × 87,612
  4. Step 4: Simplify right side
    39,432x = 7,675,862,544
  5. Step 5: Solve for x
    x = 7,675,862,544/39,432
  6. Step 6: Final answer
    x = 194,660.75

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.