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Finding the Third Proportional to 39,330 and 86,436

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Solution

The third proportional to 39,330 and 86,436 is: 189,961.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,330 : 86,436 = 86,436 : x
  2. Step 2: Convert to fraction form
    39,330/86,436 = 86,436/x
  3. Step 3: Cross multiply
    39,330x = 86,436 × 86,436
  4. Step 4: Simplify right side
    39,330x = 7,471,182,096
  5. Step 5: Solve for x
    x = 7,471,182,096/39,330
  6. Step 6: Final answer
    x = 189,961.41

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.