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Finding the Fourth Proportional to 279,375.70, 419,128.62 and 79,698.82

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Solution

The fourth proportional to 279,375.70, 419,128.62 and 79,698.82 is: 119,566.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,375.70 : 419,128.62 = 79,698.82 : x
  2. Step 2: Convert to fraction form
    279,375.70/419,128.62 = 79,698.82/x
  3. Step 3: Cross multiply
    279,375.70x = 419,128.62 × 79,698.82
  4. Step 4: Simplify right side
    279,375.70x = 33,404,056,442.23
  5. Step 5: Solve for x
    x = 33,404,056,442.23/279,375.70
  6. Step 6: Final answer
    x = 119,566.79

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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.