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Finding the Third Proportional to 39,786 and 87,851

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Solution

The third proportional to 39,786 and 87,851 is: 193,982.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786 : 87,851 = 87,851 : x
  2. Step 2: Convert to fraction form
    39,786/87,851 = 87,851/x
  3. Step 3: Cross multiply
    39,786x = 87,851 × 87,851
  4. Step 4: Simplify right side
    39,786x = 7,717,798,201
  5. Step 5: Solve for x
    x = 7,717,798,201/39,786
  6. Step 6: Final answer
    x = 193,982.76

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.