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Finding the Fourth Proportional to 381,392.11, 572,069.61 and 141,552.73

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Solution

The fourth proportional to 381,392.11, 572,069.61 and 141,552.73 is: 212,322.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,392.11 : 572,069.61 = 141,552.73 : x
  2. Step 2: Convert to fraction form
    381,392.11/572,069.61 = 141,552.73/x
  3. Step 3: Cross multiply
    381,392.11x = 572,069.61 × 141,552.73
  4. Step 4: Simplify right side
    381,392.11x = 80,978,015,045.54
  5. Step 5: Solve for x
    x = 80,978,015,045.54/381,392.11
  6. Step 6: Final answer
    x = 212,322.21

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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.