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Finding the Fourth Proportional to 198,339.18, 297,627 and 71,989.31

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Solution

The fourth proportional to 198,339.18, 297,627 and 71,989.31 is: 108,026.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,339.18 : 297,627 = 71,989.31 : x
  2. Step 2: Convert to fraction form
    198,339.18/297,627 = 71,989.31/x
  3. Step 3: Cross multiply
    198,339.18x = 297,627 × 71,989.31
  4. Step 4: Simplify right side
    198,339.18x = 21,425,960,879.24
  5. Step 5: Solve for x
    x = 21,425,960,879.24/198,339.18
  6. Step 6: Final answer
    x = 108,026.87

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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.