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Finding the Third Proportional to 39,658.50 and 86,418

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Solution

The third proportional to 39,658.50 and 86,418 is: 188,309.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,658.50 : 86,418 = 86,418 : x
  2. Step 2: Convert to fraction form
    39,658.50/86,418 = 86,418/x
  3. Step 3: Cross multiply
    39,658.50x = 86,418 × 86,418
  4. Step 4: Simplify right side
    39,658.50x = 7,468,070,724
  5. Step 5: Solve for x
    x = 7,468,070,724/39,658.50
  6. Step 6: Final answer
    x = 188,309.46

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.