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Finding the Third Proportional to 39,728 and 82,722

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Solution

The third proportional to 39,728 and 82,722 is: 172,244.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,728 : 82,722 = 82,722 : x
  2. Step 2: Convert to fraction form
    39,728/82,722 = 82,722/x
  3. Step 3: Cross multiply
    39,728x = 82,722 × 82,722
  4. Step 4: Simplify right side
    39,728x = 6,842,929,284
  5. Step 5: Solve for x
    x = 6,842,929,284/39,728
  6. Step 6: Final answer
    x = 172,244.49

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.