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Finding the Fourth Proportional to 279,380.45, 419,135.75 and 79,703.57

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Solution

The fourth proportional to 279,380.45, 419,135.75 and 79,703.57 is: 119,573.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,380.45 : 419,135.75 = 79,703.57 : x
  2. Step 2: Convert to fraction form
    279,380.45/419,135.75 = 79,703.57/x
  3. Step 3: Cross multiply
    279,380.45x = 419,135.75 × 79,703.57
  4. Step 4: Simplify right side
    279,380.45x = 33,406,615,589.63
  5. Step 5: Solve for x
    x = 33,406,615,589.63/279,380.45
  6. Step 6: Final answer
    x = 119,573.92

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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.