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Finding the Fourth Proportional to 136,207.20, 204,464.40 and 80,834.40

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Solution

The fourth proportional to 136,207.20, 204,464.40 and 80,834.40 is: 121,342.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,207.20 : 204,464.40 = 80,834.40 : x
  2. Step 2: Convert to fraction form
    136,207.20/204,464.40 = 80,834.40/x
  3. Step 3: Cross multiply
    136,207.20x = 204,464.40 × 80,834.40
  4. Step 4: Simplify right side
    136,207.20x = 16,527,757,095.36
  5. Step 5: Solve for x
    x = 16,527,757,095.36/136,207.20
  6. Step 6: Final answer
    x = 121,342.76

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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.