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Finding the Fourth Proportional to 148.23, 203.31 and 136.89

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Solution

The fourth proportional to 148.23, 203.31 and 136.89 is: 187.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.23 : 203.31 = 136.89 : x
  2. Step 2: Convert to fraction form
    148.23/203.31 = 136.89/x
  3. Step 3: Cross multiply
    148.23x = 203.31 × 136.89
  4. Step 4: Simplify right side
    148.23x = 27,831.11
  5. Step 5: Solve for x
    x = 27,831.11/148.23
  6. Step 6: Final answer
    x = 187.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.