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Finding the Fourth Proportional to 158.11, 236.82 and 147.43

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Solution

The fourth proportional to 158.11, 236.82 and 147.43 is: 220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.11 : 236.82 = 147.43 : x
  2. Step 2: Convert to fraction form
    158.11/236.82 = 147.43/x
  3. Step 3: Cross multiply
    158.11x = 236.82 × 147.43
  4. Step 4: Simplify right side
    158.11x = 34,913.89
  5. Step 5: Solve for x
    x = 34,913.89/158.11
  6. Step 6: Final answer
    x = 220.82

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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.