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Finding the Fourth Proportional to 74.14, 111.21 and 52.57

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Solution

The fourth proportional to 74.14, 111.21 and 52.57 is: 78.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.14 : 111.21 = 52.57 : x
  2. Step 2: Convert to fraction form
    74.14/111.21 = 52.57/x
  3. Step 3: Cross multiply
    74.14x = 111.21 × 52.57
  4. Step 4: Simplify right side
    74.14x = 5,846.05
  5. Step 5: Solve for x
    x = 5,846.05/74.14
  6. Step 6: Final answer
    x = 78.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.