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Finding the Third Proportional to 39,330 and 65,619

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Solution

The third proportional to 39,330 and 65,619 is: 109,480.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,330 : 65,619 = 65,619 : x
  2. Step 2: Convert to fraction form
    39,330/65,619 = 65,619/x
  3. Step 3: Cross multiply
    39,330x = 65,619 × 65,619
  4. Step 4: Simplify right side
    39,330x = 4,305,853,161
  5. Step 5: Solve for x
    x = 4,305,853,161/39,330
  6. Step 6: Final answer
    x = 109,480.12

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.