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Finding the Fourth Proportional to 69.06, 102.83 and 68.58

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Solution

The fourth proportional to 69.06, 102.83 and 68.58 is: 102.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.06 : 102.83 = 68.58 : x
  2. Step 2: Convert to fraction form
    69.06/102.83 = 68.58/x
  3. Step 3: Cross multiply
    69.06x = 102.83 × 68.58
  4. Step 4: Simplify right side
    69.06x = 7,052.08
  5. Step 5: Solve for x
    x = 7,052.08/69.06
  6. Step 6: Final answer
    x = 102.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.