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Finding the Fourth Proportional to 279,138.46, 418,644.80 and 79,454.42

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Solution

The fourth proportional to 279,138.46, 418,644.80 and 79,454.42 is: 119,163.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,138.46 : 418,644.80 = 79,454.42 : x
  2. Step 2: Convert to fraction form
    279,138.46/418,644.80 = 79,454.42/x
  3. Step 3: Cross multiply
    279,138.46x = 418,644.80 × 79,454.42
  4. Step 4: Simplify right side
    279,138.46x = 33,263,179,770.02
  5. Step 5: Solve for x
    x = 33,263,179,770.02/279,138.46
  6. Step 6: Final answer
    x = 119,163.73

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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.