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Finding the Fourth Proportional to 120.52, 166.08 and 106.72

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Solution

The fourth proportional to 120.52, 166.08 and 106.72 is: 147.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.52 : 166.08 = 106.72 : x
  2. Step 2: Convert to fraction form
    120.52/166.08 = 106.72/x
  3. Step 3: Cross multiply
    120.52x = 166.08 × 106.72
  4. Step 4: Simplify right side
    120.52x = 17,724.06
  5. Step 5: Solve for x
    x = 17,724.06/120.52
  6. Step 6: Final answer
    x = 147.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.