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Finding the Fourth Proportional to 381,002.70, 571,103.97 and 128,195.43

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Solution

The fourth proportional to 381,002.70, 571,103.97 and 128,195.43 is: 192,158.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,002.70 : 571,103.97 = 128,195.43 : x
  2. Step 2: Convert to fraction form
    381,002.70/571,103.97 = 128,195.43/x
  3. Step 3: Cross multiply
    381,002.70x = 571,103.97 × 128,195.43
  4. Step 4: Simplify right side
    381,002.70x = 73,212,916,386.48
  5. Step 5: Solve for x
    x = 73,212,916,386.48/381,002.70
  6. Step 6: Final answer
    x = 192,158.52

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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.