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Finding the Third Proportional to 39,321 and 82,287

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Solution

The third proportional to 39,321 and 82,287 is: 172,201.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,321 : 82,287 = 82,287 : x
  2. Step 2: Convert to fraction form
    39,321/82,287 = 82,287/x
  3. Step 3: Cross multiply
    39,321x = 82,287 × 82,287
  4. Step 4: Simplify right side
    39,321x = 6,771,150,369
  5. Step 5: Solve for x
    x = 6,771,150,369/39,321
  6. Step 6: Final answer
    x = 172,201.89

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.