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Finding the Fourth Proportional to 279,381.45, 419,137.25 and 79,704.57

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Solution

The fourth proportional to 279,381.45, 419,137.25 and 79,704.57 is: 119,575.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,381.45 : 419,137.25 = 79,704.57 : x
  2. Step 2: Convert to fraction form
    279,381.45/419,137.25 = 79,704.57/x
  3. Step 3: Cross multiply
    279,381.45x = 419,137.25 × 79,704.57
  4. Step 4: Simplify right side
    279,381.45x = 33,407,154,282.23
  5. Step 5: Solve for x
    x = 33,407,154,282.23/279,381.45
  6. Step 6: Final answer
    x = 119,575.42

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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.