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Finding the Fourth Proportional to 279,992.98, 419,872.69 and 87,817.90

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Solution

The fourth proportional to 279,992.98, 419,872.69 and 87,817.90 is: 131,690.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,992.98 : 419,872.69 = 87,817.90 : x
  2. Step 2: Convert to fraction form
    279,992.98/419,872.69 = 87,817.90/x
  3. Step 3: Cross multiply
    279,992.98x = 419,872.69 × 87,817.90
  4. Step 4: Simplify right side
    279,992.98x = 36,872,335,364.70
  5. Step 5: Solve for x
    x = 36,872,335,364.70/279,992.98
  6. Step 6: Final answer
    x = 131,690.21

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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.