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Finding the Fourth Proportional to 148.50, 222.76 and 84.38

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Solution

The fourth proportional to 148.50, 222.76 and 84.38 is: 126.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.50 : 222.76 = 84.38 : x
  2. Step 2: Convert to fraction form
    148.50/222.76 = 84.38/x
  3. Step 3: Cross multiply
    148.50x = 222.76 × 84.38
  4. Step 4: Simplify right side
    148.50x = 18,796.49
  5. Step 5: Solve for x
    x = 18,796.49/148.50
  6. Step 6: Final answer
    x = 126.58

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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.