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Finding the Fourth Proportional to 148.06, 221.67 and 79.46

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Solution

The fourth proportional to 148.06, 221.67 and 79.46 is: 118.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    148.06 : 221.67 = 79.46 : x
  2. Step 2: Convert to fraction form
    148.06/221.67 = 79.46/x
  3. Step 3: Cross multiply
    148.06x = 221.67 × 79.46
  4. Step 4: Simplify right side
    148.06x = 17,613.62
  5. Step 5: Solve for x
    x = 17,613.62/148.06
  6. Step 6: Final answer
    x = 118.96

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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.