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Finding the Fourth Proportional to 143.64, 197.17 and 124.20

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Solution

The fourth proportional to 143.64, 197.17 and 124.20 is: 170.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.64 : 197.17 = 124.20 : x
  2. Step 2: Convert to fraction form
    143.64/197.17 = 124.20/x
  3. Step 3: Cross multiply
    143.64x = 197.17 × 124.20
  4. Step 4: Simplify right side
    143.64x = 24,488.20
  5. Step 5: Solve for x
    x = 24,488.20/143.64
  6. Step 6: Final answer
    x = 170.48

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.