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Finding the Fourth Proportional to 188.30, 281.73 and 102.86

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Solution

The fourth proportional to 188.30, 281.73 and 102.86 is: 153.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.30 : 281.73 = 102.86 : x
  2. Step 2: Convert to fraction form
    188.30/281.73 = 102.86/x
  3. Step 3: Cross multiply
    188.30x = 281.73 × 102.86
  4. Step 4: Simplify right side
    188.30x = 28,978.75
  5. Step 5: Solve for x
    x = 28,978.75/188.30
  6. Step 6: Final answer
    x = 153.90

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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.