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Finding the Fourth Proportional to 113.70, 169.57 and 96.69

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Solution

The fourth proportional to 113.70, 169.57 and 96.69 is: 144.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.70 : 169.57 = 96.69 : x
  2. Step 2: Convert to fraction form
    113.70/169.57 = 96.69/x
  3. Step 3: Cross multiply
    113.70x = 169.57 × 96.69
  4. Step 4: Simplify right side
    113.70x = 16,395.24
  5. Step 5: Solve for x
    x = 16,395.24/113.70
  6. Step 6: Final answer
    x = 144.20

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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.