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Finding the Fourth Proportional to 69.71, 104.37 and 52.54

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Solution

The fourth proportional to 69.71, 104.37 and 52.54 is: 78.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.71 : 104.37 = 52.54 : x
  2. Step 2: Convert to fraction form
    69.71/104.37 = 52.54/x
  3. Step 3: Cross multiply
    69.71x = 104.37 × 52.54
  4. Step 4: Simplify right side
    69.71x = 5,483.29
  5. Step 5: Solve for x
    x = 5,483.29/69.71
  6. Step 6: Final answer
    x = 78.66

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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.