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Finding the Fourth Proportional to 119.65, 180.35 and 109.39

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Solution

The fourth proportional to 119.65, 180.35 and 109.39 is: 164.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.65 : 180.35 = 109.39 : x
  2. Step 2: Convert to fraction form
    119.65/180.35 = 109.39/x
  3. Step 3: Cross multiply
    119.65x = 180.35 × 109.39
  4. Step 4: Simplify right side
    119.65x = 19,727.04
  5. Step 5: Solve for x
    x = 19,727.04/119.65
  6. Step 6: Final answer
    x = 164.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.