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Finding the Fourth Proportional to 154,363.20, 231,199.20 and 126,715.20

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Solution

The fourth proportional to 154,363.20, 231,199.20 and 126,715.20 is: 189,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,363.20 : 231,199.20 = 126,715.20 : x
  2. Step 2: Convert to fraction form
    154,363.20/231,199.20 = 126,715.20/x
  3. Step 3: Cross multiply
    154,363.20x = 231,199.20 × 126,715.20
  4. Step 4: Simplify right side
    154,363.20x = 29,296,452,867.84
  5. Step 5: Solve for x
    x = 29,296,452,867.84/154,363.20
  6. Step 6: Final answer
    x = 189,789.10

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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.