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Finding the Fourth Proportional to 367,639.20, 551,458.80 and 131,248.80

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Solution

The fourth proportional to 367,639.20, 551,458.80 and 131,248.80 is: 196,873.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,639.20 : 551,458.80 = 131,248.80 : x
  2. Step 2: Convert to fraction form
    367,639.20/551,458.80 = 131,248.80/x
  3. Step 3: Cross multiply
    367,639.20x = 551,458.80 × 131,248.80
  4. Step 4: Simplify right side
    367,639.20x = 72,378,305,749.44
  5. Step 5: Solve for x
    x = 72,378,305,749.44/367,639.20
  6. Step 6: Final answer
    x = 196,873.20

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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.