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Finding the Fourth Proportional to 69.22, 103.69 and 52.13

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Solution

The fourth proportional to 69.22, 103.69 and 52.13 is: 78.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.22 : 103.69 = 52.13 : x
  2. Step 2: Convert to fraction form
    69.22/103.69 = 52.13/x
  3. Step 3: Cross multiply
    69.22x = 103.69 × 52.13
  4. Step 4: Simplify right side
    69.22x = 5,405.36
  5. Step 5: Solve for x
    x = 5,405.36/69.22
  6. Step 6: Final answer
    x = 78.09

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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.