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Finding the Fourth Proportional to 119.80, 166.09 and 114.40

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Solution

The fourth proportional to 119.80, 166.09 and 114.40 is: 158.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.80 : 166.09 = 114.40 : x
  2. Step 2: Convert to fraction form
    119.80/166.09 = 114.40/x
  3. Step 3: Cross multiply
    119.80x = 166.09 × 114.40
  4. Step 4: Simplify right side
    119.80x = 19,000.70
  5. Step 5: Solve for x
    x = 19,000.70/119.80
  6. Step 6: Final answer
    x = 158.60

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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.