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Finding the Fourth Proportional to 158, 238.22 and 126.32

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Solution

The fourth proportional to 158, 238.22 and 126.32 is: 190.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    158 : 238.22 = 126.32 : x
  2. Step 2: Convert to fraction form
    158/238.22 = 126.32/x
  3. Step 3: Cross multiply
    158x = 238.22 × 126.32
  4. Step 4: Simplify right side
    158x = 30,091.95
  5. Step 5: Solve for x
    x = 30,091.95/158
  6. Step 6: Final answer
    x = 190.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.