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Finding the Third Proportional to 39,976 and 87,788

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Solution

The third proportional to 39,976 and 87,788 is: 192,783.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,976 : 87,788 = 87,788 : x
  2. Step 2: Convert to fraction form
    39,976/87,788 = 87,788/x
  3. Step 3: Cross multiply
    39,976x = 87,788 × 87,788
  4. Step 4: Simplify right side
    39,976x = 7,706,732,944
  5. Step 5: Solve for x
    x = 7,706,732,944/39,976
  6. Step 6: Final answer
    x = 192,783.99

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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.