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Finding the Fourth Proportional to 158.55, 217.51 and 136.68

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Solution

The fourth proportional to 158.55, 217.51 and 136.68 is: 187.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.55 : 217.51 = 136.68 : x
  2. Step 2: Convert to fraction form
    158.55/217.51 = 136.68/x
  3. Step 3: Cross multiply
    158.55x = 217.51 × 136.68
  4. Step 4: Simplify right side
    158.55x = 29,729.27
  5. Step 5: Solve for x
    x = 29,729.27/158.55
  6. Step 6: Final answer
    x = 187.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.