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Finding the Fourth Proportional to 218,221.60, 327,267.60 and 85,025.20

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Solution

The fourth proportional to 218,221.60, 327,267.60 and 85,025.20 is: 127,512.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,221.60 : 327,267.60 = 85,025.20 : x
  2. Step 2: Convert to fraction form
    218,221.60/327,267.60 = 85,025.20/x
  3. Step 3: Cross multiply
    218,221.60x = 327,267.60 × 85,025.20
  4. Step 4: Simplify right side
    218,221.60x = 27,825,993,143.52
  5. Step 5: Solve for x
    x = 27,825,993,143.52/218,221.60
  6. Step 6: Final answer
    x = 127,512.55

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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.