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Finding the Fourth Proportional to 198,138.88, 297,012.57 and 126,858.61

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Solution

The fourth proportional to 198,138.88, 297,012.57 and 126,858.61 is: 190,162.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,138.88 : 297,012.57 = 126,858.61 : x
  2. Step 2: Convert to fraction form
    198,138.88/297,012.57 = 126,858.61/x
  3. Step 3: Cross multiply
    198,138.88x = 297,012.57 × 126,858.61
  4. Step 4: Simplify right side
    198,138.88x = 37,678,601,782.73
  5. Step 5: Solve for x
    x = 37,678,601,782.73/198,138.88
  6. Step 6: Final answer
    x = 190,162.59

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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.