Home / 378,942.12-568,471.50-126,135.90

Finding the Fourth Proportional to 378,942.12, 568,471.50 and 126,135.90

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Solution

The fourth proportional to 378,942.12, 568,471.50 and 126,135.90 is: 189,223.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,942.12 : 568,471.50 = 126,135.90 : x
  2. Step 2: Convert to fraction form
    378,942.12/568,471.50 = 126,135.90/x
  3. Step 3: Cross multiply
    378,942.12x = 568,471.50 × 126,135.90
  4. Step 4: Simplify right side
    378,942.12x = 71,704,664,276.85
  5. Step 5: Solve for x
    x = 71,704,664,276.85/378,942.12
  6. Step 6: Final answer
    x = 189,223.26

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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.