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Finding the Fourth Proportional to 68.82, 103.02 and 52.80

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Solution

The fourth proportional to 68.82, 103.02 and 52.80 is: 79.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.82 : 103.02 = 52.80 : x
  2. Step 2: Convert to fraction form
    68.82/103.02 = 52.80/x
  3. Step 3: Cross multiply
    68.82x = 103.02 × 52.80
  4. Step 4: Simplify right side
    68.82x = 5,439.46
  5. Step 5: Solve for x
    x = 5,439.46/68.82
  6. Step 6: Final answer
    x = 79.04

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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.