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Finding the Third Proportional to 39,668 and 85,867

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Solution

The third proportional to 39,668 and 85,867 is: 185,871.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,668 : 85,867 = 85,867 : x
  2. Step 2: Convert to fraction form
    39,668/85,867 = 85,867/x
  3. Step 3: Cross multiply
    39,668x = 85,867 × 85,867
  4. Step 4: Simplify right side
    39,668x = 7,373,141,689
  5. Step 5: Solve for x
    x = 7,373,141,689/39,668
  6. Step 6: Final answer
    x = 185,871.27

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.