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Finding the Fourth Proportional to 69.24, 104.64 and 68.52

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Solution

The fourth proportional to 69.24, 104.64 and 68.52 is: 103.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.24 : 104.64 = 68.52 : x
  2. Step 2: Convert to fraction form
    69.24/104.64 = 68.52/x
  3. Step 3: Cross multiply
    69.24x = 104.64 × 68.52
  4. Step 4: Simplify right side
    69.24x = 7,169.93
  5. Step 5: Solve for x
    x = 7,169.93/69.24
  6. Step 6: Final answer
    x = 103.55

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.