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Finding the Fourth Proportional to 119.30, 164.61 and 75.65

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Solution

The fourth proportional to 119.30, 164.61 and 75.65 is: 104.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.30 : 164.61 = 75.65 : x
  2. Step 2: Convert to fraction form
    119.30/164.61 = 75.65/x
  3. Step 3: Cross multiply
    119.30x = 164.61 × 75.65
  4. Step 4: Simplify right side
    119.30x = 12,452.75
  5. Step 5: Solve for x
    x = 12,452.75/119.30
  6. Step 6: Final answer
    x = 104.38

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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.