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Finding the Fourth Proportional to 69.36, 96.38 and 68.49

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Solution

The fourth proportional to 69.36, 96.38 and 68.49 is: 95.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.36 : 96.38 = 68.49 : x
  2. Step 2: Convert to fraction form
    69.36/96.38 = 68.49/x
  3. Step 3: Cross multiply
    69.36x = 96.38 × 68.49
  4. Step 4: Simplify right side
    69.36x = 6,600.72
  5. Step 5: Solve for x
    x = 6,600.72/69.36
  6. Step 6: Final answer
    x = 95.17

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.