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Finding the Fourth Proportional to 78.67, 117.84 and 37.96

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Solution

The fourth proportional to 78.67, 117.84 and 37.96 is: 56.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.67 : 117.84 = 37.96 : x
  2. Step 2: Convert to fraction form
    78.67/117.84 = 37.96/x
  3. Step 3: Cross multiply
    78.67x = 117.84 × 37.96
  4. Step 4: Simplify right side
    78.67x = 4,473.21
  5. Step 5: Solve for x
    x = 4,473.21/78.67
  6. Step 6: Final answer
    x = 56.86

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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.