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Finding the Fourth Proportional to 69.33, 103.86 and 52.11

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Solution

The fourth proportional to 69.33, 103.86 and 52.11 is: 78.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.33 : 103.86 = 52.11 : x
  2. Step 2: Convert to fraction form
    69.33/103.86 = 52.11/x
  3. Step 3: Cross multiply
    69.33x = 103.86 × 52.11
  4. Step 4: Simplify right side
    69.33x = 5,412.14
  5. Step 5: Solve for x
    x = 5,412.14/69.33
  6. Step 6: Final answer
    x = 78.06

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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.