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Finding the Fourth Proportional to 381,051.73, 571,373.07 and 128,247.90

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Solution

The fourth proportional to 381,051.73, 571,373.07 and 128,247.90 is: 192,303.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,051.73 : 571,373.07 = 128,247.90 : x
  2. Step 2: Convert to fraction form
    381,051.73/571,373.07 = 128,247.90/x
  3. Step 3: Cross multiply
    381,051.73x = 571,373.07 × 128,247.90
  4. Step 4: Simplify right side
    381,051.73x = 73,277,396,344.05
  5. Step 5: Solve for x
    x = 73,277,396,344.05/381,051.73
  6. Step 6: Final answer
    x = 192,303.01

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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.