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Finding the Fourth Proportional to 218,414.55, 327,621.45 and 68,667.91

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Solution

The fourth proportional to 218,414.55, 327,621.45 and 68,667.91 is: 103,001.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,414.55 : 327,621.45 = 68,667.91 : x
  2. Step 2: Convert to fraction form
    218,414.55/327,621.45 = 68,667.91/x
  3. Step 3: Cross multiply
    218,414.55x = 327,621.45 × 68,667.91
  4. Step 4: Simplify right side
    218,414.55x = 22,497,080,242.67
  5. Step 5: Solve for x
    x = 22,497,080,242.67/218,414.55
  6. Step 6: Final answer
    x = 103,001.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.