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Finding the Fourth Proportional to 381,003.83, 571,105.65 and 128,196.55

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Solution

The fourth proportional to 381,003.83, 571,105.65 and 128,196.55 is: 192,160.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,003.83 : 571,105.65 = 128,196.55 : x
  2. Step 2: Convert to fraction form
    381,003.83/571,105.65 = 128,196.55/x
  3. Step 3: Cross multiply
    381,003.83x = 571,105.65 × 128,196.55
  4. Step 4: Simplify right side
    381,003.83x = 73,213,775,210.13
  5. Step 5: Solve for x
    x = 73,213,775,210.13/381,003.83
  6. Step 6: Final answer
    x = 192,160.21

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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.