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Finding the Fourth Proportional to 143,989.52, 198,705.84 and 80,325.68

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Solution

The fourth proportional to 143,989.52, 198,705.84 and 80,325.68 is: 110,849.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,989.52 : 198,705.84 = 80,325.68 : x
  2. Step 2: Convert to fraction form
    143,989.52/198,705.84 = 80,325.68/x
  3. Step 3: Cross multiply
    143,989.52x = 198,705.84 × 80,325.68
  4. Step 4: Simplify right side
    143,989.52x = 15,961,181,717.97
  5. Step 5: Solve for x
    x = 15,961,181,717.97/143,989.52
  6. Step 6: Final answer
    x = 110,849.61

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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.