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Finding the Fourth Proportional to 279,993.98, 419,874.18 and 87,818.90

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Solution

The fourth proportional to 279,993.98, 419,874.18 and 87,818.90 is: 131,691.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,993.98 : 419,874.18 = 87,818.90 : x
  2. Step 2: Convert to fraction form
    279,993.98/419,874.18 = 87,818.90/x
  3. Step 3: Cross multiply
    279,993.98x = 419,874.18 × 87,818.90
  4. Step 4: Simplify right side
    279,993.98x = 36,872,888,626.00
  5. Step 5: Solve for x
    x = 36,872,888,626.00/279,993.98
  6. Step 6: Final answer
    x = 131,691.72

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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.