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Finding the Fourth Proportional to 203,439.60, 305,245.80 and 98,204.40

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Solution

The fourth proportional to 203,439.60, 305,245.80 and 98,204.40 is: 147,348.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,439.60 : 305,245.80 = 98,204.40 : x
  2. Step 2: Convert to fraction form
    203,439.60/305,245.80 = 98,204.40/x
  3. Step 3: Cross multiply
    203,439.60x = 305,245.80 × 98,204.40
  4. Step 4: Simplify right side
    203,439.60x = 29,976,480,641.52
  5. Step 5: Solve for x
    x = 29,976,480,641.52/203,439.60
  6. Step 6: Final answer
    x = 147,348.31

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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.