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Finding the Fourth Proportional to 154,815.20, 231,877.20 and 119,640.80

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Solution

The fourth proportional to 154,815.20, 231,877.20 and 119,640.80 is: 179,194.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,815.20 : 231,877.20 = 119,640.80 : x
  2. Step 2: Convert to fraction form
    154,815.20/231,877.20 = 119,640.80/x
  3. Step 3: Cross multiply
    154,815.20x = 231,877.20 × 119,640.80
  4. Step 4: Simplify right side
    154,815.20x = 27,741,973,709.76
  5. Step 5: Solve for x
    x = 27,741,973,709.76/154,815.20
  6. Step 6: Final answer
    x = 179,194.12

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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.