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Finding the Fourth Proportional to 158.32, 238.42 and 138.27

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Solution

The fourth proportional to 158.32, 238.42 and 138.27 is: 208.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.32 : 238.42 = 138.27 : x
  2. Step 2: Convert to fraction form
    158.32/238.42 = 138.27/x
  3. Step 3: Cross multiply
    158.32x = 238.42 × 138.27
  4. Step 4: Simplify right side
    158.32x = 32,966.33
  5. Step 5: Solve for x
    x = 32,966.33/158.32
  6. Step 6: Final answer
    x = 208.23

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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.