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Finding the Third Proportional to 40,260 and 86,720

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Solution

The third proportional to 40,260 and 86,720 is: 186,794.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,260 : 86,720 = 86,720 : x
  2. Step 2: Convert to fraction form
    40,260/86,720 = 86,720/x
  3. Step 3: Cross multiply
    40,260x = 86,720 × 86,720
  4. Step 4: Simplify right side
    40,260x = 7,520,358,400
  5. Step 5: Solve for x
    x = 7,520,358,400/40,260
  6. Step 6: Final answer
    x = 186,794.79

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.