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Finding the Fourth Proportional to 218,379.28, 326,960.68 and 111,531.88

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Solution

The fourth proportional to 218,379.28, 326,960.68 and 111,531.88 is: 166,987.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,379.28 : 326,960.68 = 111,531.88 : x
  2. Step 2: Convert to fraction form
    218,379.28/326,960.68 = 111,531.88/x
  3. Step 3: Cross multiply
    218,379.28x = 326,960.68 × 111,531.88
  4. Step 4: Simplify right side
    218,379.28x = 36,466,539,326.48
  5. Step 5: Solve for x
    x = 36,466,539,326.48/218,379.28
  6. Step 6: Final answer
    x = 166,987.18

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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.