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Finding the Fourth Proportional to 218,615.21, 327,891.65 and 68,851.59

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Solution

The fourth proportional to 218,615.21, 327,891.65 and 68,851.59 is: 103,267.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,615.21 : 327,891.65 = 68,851.59 : x
  2. Step 2: Convert to fraction form
    218,615.21/327,891.65 = 68,851.59/x
  3. Step 3: Cross multiply
    218,615.21x = 327,891.65 × 68,851.59
  4. Step 4: Simplify right side
    218,615.21x = 22,575,861,105.97
  5. Step 5: Solve for x
    x = 22,575,861,105.97/218,615.21
  6. Step 6: Final answer
    x = 103,267.57

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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.