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Finding the Fourth Proportional to 378,999.95, 568,309.75 and 126,191.39

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Solution

The fourth proportional to 378,999.95, 568,309.75 and 126,191.39 is: 189,223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,999.95 : 568,309.75 = 126,191.39 : x
  2. Step 2: Convert to fraction form
    378,999.95/568,309.75 = 126,191.39/x
  3. Step 3: Cross multiply
    378,999.95x = 568,309.75 × 126,191.39
  4. Step 4: Simplify right side
    378,999.95x = 71,715,794,146.03
  5. Step 5: Solve for x
    x = 71,715,794,146.03/378,999.95
  6. Step 6: Final answer
    x = 189,223.76

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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.