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Finding the Fourth Proportional to 119.22, 164.52 and 66.76

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Solution

The fourth proportional to 119.22, 164.52 and 66.76 is: 92.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.22 : 164.52 = 66.76 : x
  2. Step 2: Convert to fraction form
    119.22/164.52 = 66.76/x
  3. Step 3: Cross multiply
    119.22x = 164.52 × 66.76
  4. Step 4: Simplify right side
    119.22x = 10,983.36
  5. Step 5: Solve for x
    x = 10,983.36/119.22
  6. Step 6: Final answer
    x = 92.13

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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.