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Finding the Fourth Proportional to 198,699.21, 297,868.52 and 72,250.11

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Solution

The fourth proportional to 198,699.21, 297,868.52 and 72,250.11 is: 108,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,699.21 : 297,868.52 = 72,250.11 : x
  2. Step 2: Convert to fraction form
    198,699.21/297,868.52 = 72,250.11/x
  3. Step 3: Cross multiply
    198,699.21x = 297,868.52 × 72,250.11
  4. Step 4: Simplify right side
    198,699.21x = 21,521,033,516.16
  5. Step 5: Solve for x
    x = 21,521,033,516.16/198,699.21
  6. Step 6: Final answer
    x = 108,309.61

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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.