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Finding the Fourth Proportional to 188.45, 281.94 and 111.48

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Solution

The fourth proportional to 188.45, 281.94 and 111.48 is: 166.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.45 : 281.94 = 111.48 : x
  2. Step 2: Convert to fraction form
    188.45/281.94 = 111.48/x
  3. Step 3: Cross multiply
    188.45x = 281.94 × 111.48
  4. Step 4: Simplify right side
    188.45x = 31,430.67
  5. Step 5: Solve for x
    x = 31,430.67/188.45
  6. Step 6: Final answer
    x = 166.79

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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.