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Finding the Fourth Proportional to 148.60, 222.90 and 80.15

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Solution

The fourth proportional to 148.60, 222.90 and 80.15 is: 120.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.60 : 222.90 = 80.15 : x
  2. Step 2: Convert to fraction form
    148.60/222.90 = 80.15/x
  3. Step 3: Cross multiply
    148.60x = 222.90 × 80.15
  4. Step 4: Simplify right side
    148.60x = 17,865.03
  5. Step 5: Solve for x
    x = 17,865.03/148.60
  6. Step 6: Final answer
    x = 120.23

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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.