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Finding the Fourth Proportional to 122.06, 168.03 and 109.75

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Solution

The fourth proportional to 122.06, 168.03 and 109.75 is: 151.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.06 : 168.03 = 109.75 : x
  2. Step 2: Convert to fraction form
    122.06/168.03 = 109.75/x
  3. Step 3: Cross multiply
    122.06x = 168.03 × 109.75
  4. Step 4: Simplify right side
    122.06x = 18,441.29
  5. Step 5: Solve for x
    x = 18,441.29/122.06
  6. Step 6: Final answer
    x = 151.08

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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.