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Finding the Fourth Proportional to 143,758.80, 198,385.20 and 80,099.28

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Solution

The fourth proportional to 143,758.80, 198,385.20 and 80,099.28 is: 110,535.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,758.80 : 198,385.20 = 80,099.28 : x
  2. Step 2: Convert to fraction form
    143,758.80/198,385.20 = 80,099.28/x
  3. Step 3: Cross multiply
    143,758.80x = 198,385.20 × 80,099.28
  4. Step 4: Simplify right side
    143,758.80x = 15,890,511,682.66
  5. Step 5: Solve for x
    x = 15,890,511,682.66/143,758.80
  6. Step 6: Final answer
    x = 110,535.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.