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Finding the Fourth Proportional to 279,862.52, 419,670.18 and 80,137.52

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Solution

The fourth proportional to 279,862.52, 419,670.18 and 80,137.52 is: 120,170.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,862.52 : 419,670.18 = 80,137.52 : x
  2. Step 2: Convert to fraction form
    279,862.52/419,670.18 = 80,137.52/x
  3. Step 3: Cross multiply
    279,862.52x = 419,670.18 × 80,137.52
  4. Step 4: Simplify right side
    279,862.52x = 33,631,327,443.15
  5. Step 5: Solve for x
    x = 33,631,327,443.15/279,862.52
  6. Step 6: Final answer
    x = 120,170.89

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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.