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Finding the Fourth Proportional to 143.96, 198.84 and 113.25

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Solution

The fourth proportional to 143.96, 198.84 and 113.25 is: 156.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.96 : 198.84 = 113.25 : x
  2. Step 2: Convert to fraction form
    143.96/198.84 = 113.25/x
  3. Step 3: Cross multiply
    143.96x = 198.84 × 113.25
  4. Step 4: Simplify right side
    143.96x = 22,518.63
  5. Step 5: Solve for x
    x = 22,518.63/143.96
  6. Step 6: Final answer
    x = 156.43

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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.