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Finding the Fourth Proportional to 279,778.68, 419,665.86 and 80,103.96

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Solution

The fourth proportional to 279,778.68, 419,665.86 and 80,103.96 is: 120,155.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,778.68 : 419,665.86 = 80,103.96 : x
  2. Step 2: Convert to fraction form
    279,778.68/419,665.86 = 80,103.96/x
  3. Step 3: Cross multiply
    279,778.68x = 419,665.86 × 80,103.96
  4. Step 4: Simplify right side
    279,778.68x = 33,616,897,262.81
  5. Step 5: Solve for x
    x = 33,616,897,262.81/279,778.68
  6. Step 6: Final answer
    x = 120,155.32

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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.