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Finding the Fourth Proportional to 119.01, 164.23 and 66.55

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Solution

The fourth proportional to 119.01, 164.23 and 66.55 is: 91.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.01 : 164.23 = 66.55 : x
  2. Step 2: Convert to fraction form
    119.01/164.23 = 66.55/x
  3. Step 3: Cross multiply
    119.01x = 164.23 × 66.55
  4. Step 4: Simplify right side
    119.01x = 10,928.69
  5. Step 5: Solve for x
    x = 10,928.69/119.01
  6. Step 6: Final answer
    x = 91.83

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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.