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Finding the Fourth Proportional to 120.95, 166.34 and 101.27

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Solution

The fourth proportional to 120.95, 166.34 and 101.27 is: 139.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.95 : 166.34 = 101.27 : x
  2. Step 2: Convert to fraction form
    120.95/166.34 = 101.27/x
  3. Step 3: Cross multiply
    120.95x = 166.34 × 101.27
  4. Step 4: Simplify right side
    120.95x = 16,844.75
  5. Step 5: Solve for x
    x = 16,844.75/120.95
  6. Step 6: Final answer
    x = 139.27

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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.