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Finding the Fourth Proportional to 158.93, 238.29 and 81.83

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Solution

The fourth proportional to 158.93, 238.29 and 81.83 is: 122.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.93 : 238.29 = 81.83 : x
  2. Step 2: Convert to fraction form
    158.93/238.29 = 81.83/x
  3. Step 3: Cross multiply
    158.93x = 238.29 × 81.83
  4. Step 4: Simplify right side
    158.93x = 19,499.27
  5. Step 5: Solve for x
    x = 19,499.27/158.93
  6. Step 6: Final answer
    x = 122.69

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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.