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Finding the Fourth Proportional to 96.77, 144.91 and 69.65

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Solution

The fourth proportional to 96.77, 144.91 and 69.65 is: 104.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.77 : 144.91 = 69.65 : x
  2. Step 2: Convert to fraction form
    96.77/144.91 = 69.65/x
  3. Step 3: Cross multiply
    96.77x = 144.91 × 69.65
  4. Step 4: Simplify right side
    96.77x = 10,092.98
  5. Step 5: Solve for x
    x = 10,092.98/96.77
  6. Step 6: Final answer
    x = 104.30

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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.