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Finding the Fourth Proportional to 147.26, 221.76 and 106.96

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Solution

The fourth proportional to 147.26, 221.76 and 106.96 is: 161.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.26 : 221.76 = 106.96 : x
  2. Step 2: Convert to fraction form
    147.26/221.76 = 106.96/x
  3. Step 3: Cross multiply
    147.26x = 221.76 × 106.96
  4. Step 4: Simplify right side
    147.26x = 23,717.81
  5. Step 5: Solve for x
    x = 23,717.81/147.26
  6. Step 6: Final answer
    x = 161.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.