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Finding the Fourth Proportional to 143.19, 197.46 and 124.56

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Solution

The fourth proportional to 143.19, 197.46 and 124.56 is: 171.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.19 : 197.46 = 124.56 : x
  2. Step 2: Convert to fraction form
    143.19/197.46 = 124.56/x
  3. Step 3: Cross multiply
    143.19x = 197.46 × 124.56
  4. Step 4: Simplify right side
    143.19x = 24,595.62
  5. Step 5: Solve for x
    x = 24,595.62/143.19
  6. Step 6: Final answer
    x = 171.77

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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.