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Finding the Fourth Proportional to 279,568.86, 419,367.05 and 79,918.44

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Solution

The fourth proportional to 279,568.86, 419,367.05 and 79,918.44 is: 119,881.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,568.86 : 419,367.05 = 79,918.44 : x
  2. Step 2: Convert to fraction form
    279,568.86/419,367.05 = 79,918.44/x
  3. Step 3: Cross multiply
    279,568.86x = 419,367.05 × 79,918.44
  4. Step 4: Simplify right side
    279,568.86x = 33,515,160,423.40
  5. Step 5: Solve for x
    x = 33,515,160,423.40/279,568.86
  6. Step 6: Final answer
    x = 119,881.59

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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.