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Finding the Fourth Proportional to 279,374.70, 419,127.12 and 79,697.82

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Solution

The fourth proportional to 279,374.70, 419,127.12 and 79,697.82 is: 119,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,374.70 : 419,127.12 = 79,697.82 : x
  2. Step 2: Convert to fraction form
    279,374.70/419,127.12 = 79,697.82/x
  3. Step 3: Cross multiply
    279,374.70x = 419,127.12 × 79,697.82
  4. Step 4: Simplify right side
    279,374.70x = 33,403,517,766.88
  5. Step 5: Solve for x
    x = 33,403,517,766.88/279,374.70
  6. Step 6: Final answer
    x = 119,565.29

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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.