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Finding the Fourth Proportional to 119.79, 164.97 and 103.41

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Solution

The fourth proportional to 119.79, 164.97 and 103.41 is: 142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.79 : 164.97 = 103.41 : x
  2. Step 2: Convert to fraction form
    119.79/164.97 = 103.41/x
  3. Step 3: Cross multiply
    119.79x = 164.97 × 103.41
  4. Step 4: Simplify right side
    119.79x = 17,059.55
  5. Step 5: Solve for x
    x = 17,059.55/119.79
  6. Step 6: Final answer
    x = 142.41

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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.