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Finding the Fourth Proportional to 66,679.20, 99,843.84 and 43,234.56

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Solution

The fourth proportional to 66,679.20, 99,843.84 and 43,234.56 is: 64,738.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,679.20 : 99,843.84 = 43,234.56 : x
  2. Step 2: Convert to fraction form
    66,679.20/99,843.84 = 43,234.56/x
  3. Step 3: Cross multiply
    66,679.20x = 99,843.84 × 43,234.56
  4. Step 4: Simplify right side
    66,679.20x = 4,316,704,491.11
  5. Step 5: Solve for x
    x = 4,316,704,491.11/66,679.20
  6. Step 6: Final answer
    x = 64,738.40

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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.