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Finding the Fourth Proportional to 279,788.72, 419,559.62 and 80,063.64

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Solution

The fourth proportional to 279,788.72, 419,559.62 and 80,063.64 is: 120,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,788.72 : 419,559.62 = 80,063.64 : x
  2. Step 2: Convert to fraction form
    279,788.72/419,559.62 = 80,063.64/x
  3. Step 3: Cross multiply
    279,788.72x = 419,559.62 × 80,063.64
  4. Step 4: Simplify right side
    279,788.72x = 33,591,469,973.90
  5. Step 5: Solve for x
    x = 33,591,469,973.90/279,788.72
  6. Step 6: Final answer
    x = 120,060.13

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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.