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Finding the Fourth Proportional to 148.58, 221.74 and 131.27

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Solution

The fourth proportional to 148.58, 221.74 and 131.27 is: 195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.58 : 221.74 = 131.27 : x
  2. Step 2: Convert to fraction form
    148.58/221.74 = 131.27/x
  3. Step 3: Cross multiply
    148.58x = 221.74 × 131.27
  4. Step 4: Simplify right side
    148.58x = 29,107.62
  5. Step 5: Solve for x
    x = 29,107.62/148.58
  6. Step 6: Final answer
    x = 195.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.