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Finding the Fourth Proportional to 148.89, 223.41 and 71.91

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Solution

The fourth proportional to 148.89, 223.41 and 71.91 is: 107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.89 : 223.41 = 71.91 : x
  2. Step 2: Convert to fraction form
    148.89/223.41 = 71.91/x
  3. Step 3: Cross multiply
    148.89x = 223.41 × 71.91
  4. Step 4: Simplify right side
    148.89x = 16,065.41
  5. Step 5: Solve for x
    x = 16,065.41/148.89
  6. Step 6: Final answer
    x = 107.90

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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.