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Finding the Fourth Proportional to 148.88, 223.39 and 80.47

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Solution

The fourth proportional to 148.88, 223.39 and 80.47 is: 120.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.88 : 223.39 = 80.47 : x
  2. Step 2: Convert to fraction form
    148.88/223.39 = 80.47/x
  3. Step 3: Cross multiply
    148.88x = 223.39 × 80.47
  4. Step 4: Simplify right side
    148.88x = 17,975.23
  5. Step 5: Solve for x
    x = 17,975.23/148.88
  6. Step 6: Final answer
    x = 120.74

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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.