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Finding the Fourth Proportional to 113.21, 168.94 and 96.95

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Solution

The fourth proportional to 113.21, 168.94 and 96.95 is: 144.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.21 : 168.94 = 96.95 : x
  2. Step 2: Convert to fraction form
    113.21/168.94 = 96.95/x
  3. Step 3: Cross multiply
    113.21x = 168.94 × 96.95
  4. Step 4: Simplify right side
    113.21x = 16,378.73
  5. Step 5: Solve for x
    x = 16,378.73/113.21
  6. Step 6: Final answer
    x = 144.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.