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Finding the Fourth Proportional to 188.08, 281.96 and 74.16

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Solution

The fourth proportional to 188.08, 281.96 and 74.16 is: 111.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.08 : 281.96 = 74.16 : x
  2. Step 2: Convert to fraction form
    188.08/281.96 = 74.16/x
  3. Step 3: Cross multiply
    188.08x = 281.96 × 74.16
  4. Step 4: Simplify right side
    188.08x = 20,910.15
  5. Step 5: Solve for x
    x = 20,910.15/188.08
  6. Step 6: Final answer
    x = 111.18

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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.