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Finding the Fourth Proportional to 381,199.19, 571,800.74 and 128,481.86

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Solution

The fourth proportional to 381,199.19, 571,800.74 and 128,481.86 is: 192,723.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,199.19 : 571,800.74 = 128,481.86 : x
  2. Step 2: Convert to fraction form
    381,199.19/571,800.74 = 128,481.86/x
  3. Step 3: Cross multiply
    381,199.19x = 571,800.74 × 128,481.86
  4. Step 4: Simplify right side
    381,199.19x = 73,466,019,123.16
  5. Step 5: Solve for x
    x = 73,466,019,123.16/381,199.19
  6. Step 6: Final answer
    x = 192,723.44

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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.