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Finding the Fourth Proportional to 203,439.60, 305,159.40 and 132,580.80

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Solution

The fourth proportional to 203,439.60, 305,159.40 and 132,580.80 is: 198,871.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,439.60 : 305,159.40 = 132,580.80 : x
  2. Step 2: Convert to fraction form
    203,439.60/305,159.40 = 132,580.80/x
  3. Step 3: Cross multiply
    203,439.60x = 305,159.40 × 132,580.80
  4. Step 4: Simplify right side
    203,439.60x = 40,458,277,379.52
  5. Step 5: Solve for x
    x = 40,458,277,379.52/203,439.60
  6. Step 6: Final answer
    x = 198,871.20

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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.