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Finding the Fourth Proportional to 143,862, 198,527.28 and 80,203.68

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Solution

The fourth proportional to 143,862, 198,527.28 and 80,203.68 is: 110,679.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,862 : 198,527.28 = 80,203.68 : x
  2. Step 2: Convert to fraction form
    143,862/198,527.28 = 80,203.68/x
  3. Step 3: Cross multiply
    143,862x = 198,527.28 × 80,203.68
  4. Step 4: Simplify right side
    143,862x = 15,922,618,436.39
  5. Step 5: Solve for x
    x = 15,922,618,436.39/143,862
  6. Step 6: Final answer
    x = 110,679.81

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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.