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Finding the Fourth Proportional to 381,250.59, 571,476.87 and 128,443.73

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Solution

The fourth proportional to 381,250.59, 571,476.87 and 128,443.73 is: 192,531.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,250.59 : 571,476.87 = 128,443.73 : x
  2. Step 2: Convert to fraction form
    381,250.59/571,476.87 = 128,443.73/x
  3. Step 3: Cross multiply
    381,250.59x = 571,476.87 × 128,443.73
  4. Step 4: Simplify right side
    381,250.59x = 73,402,617,934.14
  5. Step 5: Solve for x
    x = 73,402,617,934.14/381,250.59
  6. Step 6: Final answer
    x = 192,531.16

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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.