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Finding the Fourth Proportional to 75, 112.42 and 34.37

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Solution

The fourth proportional to 75, 112.42 and 34.37 is: 51.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    75 : 112.42 = 34.37 : x
  2. Step 2: Convert to fraction form
    75/112.42 = 34.37/x
  3. Step 3: Cross multiply
    75x = 112.42 × 34.37
  4. Step 4: Simplify right side
    75x = 3,863.88
  5. Step 5: Solve for x
    x = 3,863.88/75
  6. Step 6: Final answer
    x = 51.52

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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.