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Finding the Fourth Proportional to 148.49, 222.91 and 80.15

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Solution

The fourth proportional to 148.49, 222.91 and 80.15 is: 120.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.49 : 222.91 = 80.15 : x
  2. Step 2: Convert to fraction form
    148.49/222.91 = 80.15/x
  3. Step 3: Cross multiply
    148.49x = 222.91 × 80.15
  4. Step 4: Simplify right side
    148.49x = 17,866.24
  5. Step 5: Solve for x
    x = 17,866.24/148.49
  6. Step 6: Final answer
    x = 120.32

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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.