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Finding the Fourth Proportional to 76.18, 104.53 and 74.14

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Solution

The fourth proportional to 76.18, 104.53 and 74.14 is: 101.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.18 : 104.53 = 74.14 : x
  2. Step 2: Convert to fraction form
    76.18/104.53 = 74.14/x
  3. Step 3: Cross multiply
    76.18x = 104.53 × 74.14
  4. Step 4: Simplify right side
    76.18x = 7,749.85
  5. Step 5: Solve for x
    x = 7,749.85/76.18
  6. Step 6: Final answer
    x = 101.73

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.