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Finding the Third Proportional to 39,505.50 and 86,739

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Solution

The third proportional to 39,505.50 and 86,739 is: 190,445.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,505.50 : 86,739 = 86,739 : x
  2. Step 2: Convert to fraction form
    39,505.50/86,739 = 86,739/x
  3. Step 3: Cross multiply
    39,505.50x = 86,739 × 86,739
  4. Step 4: Simplify right side
    39,505.50x = 7,523,654,121
  5. Step 5: Solve for x
    x = 7,523,654,121/39,505.50
  6. Step 6: Final answer
    x = 190,445.74

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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.