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Finding the Fourth Proportional to 75.82, 113.46 and 48.42

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Solution

The fourth proportional to 75.82, 113.46 and 48.42 is: 72.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.82 : 113.46 = 48.42 : x
  2. Step 2: Convert to fraction form
    75.82/113.46 = 48.42/x
  3. Step 3: Cross multiply
    75.82x = 113.46 × 48.42
  4. Step 4: Simplify right side
    75.82x = 5,493.73
  5. Step 5: Solve for x
    x = 5,493.73/75.82
  6. Step 6: Final answer
    x = 72.46

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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.