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Finding the Fourth Proportional to 119.70, 166.34 and 119.22

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Solution

The fourth proportional to 119.70, 166.34 and 119.22 is: 165.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.70 : 166.34 = 119.22 : x
  2. Step 2: Convert to fraction form
    119.70/166.34 = 119.22/x
  3. Step 3: Cross multiply
    119.70x = 166.34 × 119.22
  4. Step 4: Simplify right side
    119.70x = 19,830.46
  5. Step 5: Solve for x
    x = 19,830.46/119.70
  6. Step 6: Final answer
    x = 165.67

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.