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Finding the Fourth Proportional to 143.20, 197.16 and 114.16

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Solution

The fourth proportional to 143.20, 197.16 and 114.16 is: 157.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.20 : 197.16 = 114.16 : x
  2. Step 2: Convert to fraction form
    143.20/197.16 = 114.16/x
  3. Step 3: Cross multiply
    143.20x = 197.16 × 114.16
  4. Step 4: Simplify right side
    143.20x = 22,507.79
  5. Step 5: Solve for x
    x = 22,507.79/143.20
  6. Step 6: Final answer
    x = 157.18

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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.