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Finding the Fourth Proportional to 148.48, 205.20 and 113.92

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Solution

The fourth proportional to 148.48, 205.20 and 113.92 is: 157.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.48 : 205.20 = 113.92 : x
  2. Step 2: Convert to fraction form
    148.48/205.20 = 113.92/x
  3. Step 3: Cross multiply
    148.48x = 205.20 × 113.92
  4. Step 4: Simplify right side
    148.48x = 23,376.38
  5. Step 5: Solve for x
    x = 23,376.38/148.48
  6. Step 6: Final answer
    x = 157.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.