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Finding the Fourth Proportional to 143.18, 197.61 and 96.62

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Solution

The fourth proportional to 143.18, 197.61 and 96.62 is: 133.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.18 : 197.61 = 96.62 : x
  2. Step 2: Convert to fraction form
    143.18/197.61 = 96.62/x
  3. Step 3: Cross multiply
    143.18x = 197.61 × 96.62
  4. Step 4: Simplify right side
    143.18x = 19,093.08
  5. Step 5: Solve for x
    x = 19,093.08/143.18
  6. Step 6: Final answer
    x = 133.35

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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.