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Finding the Third Proportional to 39,778.50 and 87,555

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Solution

The third proportional to 39,778.50 and 87,555 is: 192,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.50 : 87,555 = 87,555 : x
  2. Step 2: Convert to fraction form
    39,778.50/87,555 = 87,555/x
  3. Step 3: Cross multiply
    39,778.50x = 87,555 × 87,555
  4. Step 4: Simplify right side
    39,778.50x = 7,665,878,025
  5. Step 5: Solve for x
    x = 7,665,878,025/39,778.50
  6. Step 6: Final answer
    x = 192,714.10

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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.