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Finding the Fourth Proportional to 69.36, 102.84 and 68.73

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Solution

The fourth proportional to 69.36, 102.84 and 68.73 is: 101.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.36 : 102.84 = 68.73 : x
  2. Step 2: Convert to fraction form
    69.36/102.84 = 68.73/x
  3. Step 3: Cross multiply
    69.36x = 102.84 × 68.73
  4. Step 4: Simplify right side
    69.36x = 7,068.19
  5. Step 5: Solve for x
    x = 7,068.19/69.36
  6. Step 6: Final answer
    x = 101.91

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.