Home / 381,156.05-571,786.88-128,508.86

Finding the Fourth Proportional to 381,156.05, 571,786.88 and 128,508.86

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Solution

The fourth proportional to 381,156.05, 571,786.88 and 128,508.86 is: 192,781.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,156.05 : 571,786.88 = 128,508.86 : x
  2. Step 2: Convert to fraction form
    381,156.05/571,786.88 = 128,508.86/x
  3. Step 3: Cross multiply
    381,156.05x = 571,786.88 × 128,508.86
  4. Step 4: Simplify right side
    381,156.05x = 73,479,680,898.68
  5. Step 5: Solve for x
    x = 73,479,680,898.68/381,156.05
  6. Step 6: Final answer
    x = 192,781.09

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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.