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Finding the Fourth Proportional to 76.34, 114.42 and 35.78

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Solution

The fourth proportional to 76.34, 114.42 and 35.78 is: 53.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.34 : 114.42 = 35.78 : x
  2. Step 2: Convert to fraction form
    76.34/114.42 = 35.78/x
  3. Step 3: Cross multiply
    76.34x = 114.42 × 35.78
  4. Step 4: Simplify right side
    76.34x = 4,093.95
  5. Step 5: Solve for x
    x = 4,093.95/76.34
  6. Step 6: Final answer
    x = 53.63

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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.