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Finding the Fourth Proportional to 279,452.60, 419,178.90 and 89,912.60

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Solution

The fourth proportional to 279,452.60, 419,178.90 and 89,912.60 is: 134,868.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,452.60 : 419,178.90 = 89,912.60 : x
  2. Step 2: Convert to fraction form
    279,452.60/419,178.90 = 89,912.60/x
  3. Step 3: Cross multiply
    279,452.60x = 419,178.90 × 89,912.60
  4. Step 4: Simplify right side
    279,452.60x = 37,689,464,764.14
  5. Step 5: Solve for x
    x = 37,689,464,764.14/279,452.60
  6. Step 6: Final answer
    x = 134,868.90

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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.