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Finding the Fourth Proportional to 96.30, 144.21 and 69.18

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Solution

The fourth proportional to 96.30, 144.21 and 69.18 is: 103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.30 : 144.21 = 69.18 : x
  2. Step 2: Convert to fraction form
    96.30/144.21 = 69.18/x
  3. Step 3: Cross multiply
    96.30x = 144.21 × 69.18
  4. Step 4: Simplify right side
    96.30x = 9,976.45
  5. Step 5: Solve for x
    x = 9,976.45/96.30
  6. Step 6: Final answer
    x = 103.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.