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Finding the Fourth Proportional to 218,326.60, 327,489.90 and 85,211.20

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Solution

The fourth proportional to 218,326.60, 327,489.90 and 85,211.20 is: 127,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,326.60 : 327,489.90 = 85,211.20 : x
  2. Step 2: Convert to fraction form
    218,326.60/327,489.90 = 85,211.20/x
  3. Step 3: Cross multiply
    218,326.60x = 327,489.90 × 85,211.20
  4. Step 4: Simplify right side
    218,326.60x = 27,905,807,366.88
  5. Step 5: Solve for x
    x = 27,905,807,366.88/218,326.60
  6. Step 6: Final answer
    x = 127,816.80

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1.5x scale

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.