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Finding the Fourth Proportional to 126.58, 189.91 and 119.22

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Solution

The fourth proportional to 126.58, 189.91 and 119.22 is: 178.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.58 : 189.91 = 119.22 : x
  2. Step 2: Convert to fraction form
    126.58/189.91 = 119.22/x
  3. Step 3: Cross multiply
    126.58x = 189.91 × 119.22
  4. Step 4: Simplify right side
    126.58x = 22,641.07
  5. Step 5: Solve for x
    x = 22,641.07/126.58
  6. Step 6: Final answer
    x = 178.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.