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Finding the Fourth Proportional to 75.22, 112.87 and 27.12

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Solution

The fourth proportional to 75.22, 112.87 and 27.12 is: 40.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.22 : 112.87 = 27.12 : x
  2. Step 2: Convert to fraction form
    75.22/112.87 = 27.12/x
  3. Step 3: Cross multiply
    75.22x = 112.87 × 27.12
  4. Step 4: Simplify right side
    75.22x = 3,061.03
  5. Step 5: Solve for x
    x = 3,061.03/75.22
  6. Step 6: Final answer
    x = 40.70

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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.