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Finding the Third Proportional to 39,180 and 86,135

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Solution

The third proportional to 39,180 and 86,135 is: 189,362.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,180 : 86,135 = 86,135 : x
  2. Step 2: Convert to fraction form
    39,180/86,135 = 86,135/x
  3. Step 3: Cross multiply
    39,180x = 86,135 × 86,135
  4. Step 4: Simplify right side
    39,180x = 7,419,238,225
  5. Step 5: Solve for x
    x = 7,419,238,225/39,180
  6. Step 6: Final answer
    x = 189,362.89

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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.