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Finding the Fourth Proportional to 148.92, 223.18 and 76.63

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Solution

The fourth proportional to 148.92, 223.18 and 76.63 is: 114.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.92 : 223.18 = 76.63 : x
  2. Step 2: Convert to fraction form
    148.92/223.18 = 76.63/x
  3. Step 3: Cross multiply
    148.92x = 223.18 × 76.63
  4. Step 4: Simplify right side
    148.92x = 17,101.90
  5. Step 5: Solve for x
    x = 17,101.90/148.92
  6. Step 6: Final answer
    x = 114.84

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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.