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Finding the Fourth Proportional to 158.11, 236.32 and 154.87

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Solution

The fourth proportional to 158.11, 236.32 and 154.87 is: 231.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.11 : 236.32 = 154.87 : x
  2. Step 2: Convert to fraction form
    158.11/236.32 = 154.87/x
  3. Step 3: Cross multiply
    158.11x = 236.32 × 154.87
  4. Step 4: Simplify right side
    158.11x = 36,598.88
  5. Step 5: Solve for x
    x = 36,598.88/158.11
  6. Step 6: Final answer
    x = 231.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.