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Finding the Fourth Proportional to 69.55, 95.96 and 40.43

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Solution

The fourth proportional to 69.55, 95.96 and 40.43 is: 55.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.55 : 95.96 = 40.43 : x
  2. Step 2: Convert to fraction form
    69.55/95.96 = 40.43/x
  3. Step 3: Cross multiply
    69.55x = 95.96 × 40.43
  4. Step 4: Simplify right side
    69.55x = 3,879.46
  5. Step 5: Solve for x
    x = 3,879.46/69.55
  6. Step 6: Final answer
    x = 55.78

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.