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Finding the Fourth Proportional to 279,481.28, 419,163.12 and 89,958.58

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Solution

The fourth proportional to 279,481.28, 419,163.12 and 89,958.58 is: 134,918.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,481.28 : 419,163.12 = 89,958.58 : x
  2. Step 2: Convert to fraction form
    279,481.28/419,163.12 = 89,958.58/x
  3. Step 3: Cross multiply
    279,481.28x = 419,163.12 × 89,958.58
  4. Step 4: Simplify right side
    279,481.28x = 37,707,318,015.66
  5. Step 5: Solve for x
    x = 37,707,318,015.66/279,481.28
  6. Step 6: Final answer
    x = 134,918.94

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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.