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Finding the Fourth Proportional to 158.13, 238.13 and 138.08

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Solution

The fourth proportional to 158.13, 238.13 and 138.08 is: 207.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.13 : 238.13 = 138.08 : x
  2. Step 2: Convert to fraction form
    158.13/238.13 = 138.08/x
  3. Step 3: Cross multiply
    158.13x = 238.13 × 138.08
  4. Step 4: Simplify right side
    158.13x = 32,880.90
  5. Step 5: Solve for x
    x = 32,880.90/158.13
  6. Step 6: Final answer
    x = 207.94

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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.