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Finding the Fourth Proportional to 143.16, 197.37 and 113.75

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Solution

The fourth proportional to 143.16, 197.37 and 113.75 is: 156.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.16 : 197.37 = 113.75 : x
  2. Step 2: Convert to fraction form
    143.16/197.37 = 113.75/x
  3. Step 3: Cross multiply
    143.16x = 197.37 × 113.75
  4. Step 4: Simplify right side
    143.16x = 22,451.35
  5. Step 5: Solve for x
    x = 22,451.35/143.16
  6. Step 6: Final answer
    x = 156.83

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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.