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Finding the Third Proportional to 39,926 and 84,720

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Solution

The third proportional to 39,926 and 84,720 is: 179,769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,926 : 84,720 = 84,720 : x
  2. Step 2: Convert to fraction form
    39,926/84,720 = 84,720/x
  3. Step 3: Cross multiply
    39,926x = 84,720 × 84,720
  4. Step 4: Simplify right side
    39,926x = 7,177,478,400
  5. Step 5: Solve for x
    x = 7,177,478,400/39,926
  6. Step 6: Final answer
    x = 179,769.53

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.