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Finding the Fourth Proportional to 279,329.73, 419,019.29 and 79,645.83

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Solution

The fourth proportional to 279,329.73, 419,019.29 and 79,645.83 is: 119,475.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,329.73 : 419,019.29 = 79,645.83 : x
  2. Step 2: Convert to fraction form
    279,329.73/419,019.29 = 79,645.83/x
  3. Step 3: Cross multiply
    279,329.73x = 419,019.29 × 79,645.83
  4. Step 4: Simplify right side
    279,329.73x = 33,373,138,739.83
  5. Step 5: Solve for x
    x = 33,373,138,739.83/279,329.73
  6. Step 6: Final answer
    x = 119,475.78

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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.