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Finding the Fourth Proportional to 119.28, 164.28 and 116.88

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Solution

The fourth proportional to 119.28, 164.28 and 116.88 is: 160.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.28 : 164.28 = 116.88 : x
  2. Step 2: Convert to fraction form
    119.28/164.28 = 116.88/x
  3. Step 3: Cross multiply
    119.28x = 164.28 × 116.88
  4. Step 4: Simplify right side
    119.28x = 19,201.05
  5. Step 5: Solve for x
    x = 19,201.05/119.28
  6. Step 6: Final answer
    x = 160.97

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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.