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Finding the Fourth Proportional to 159.41, 239.12 and 87.23

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Solution

The fourth proportional to 159.41, 239.12 and 87.23 is: 130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.41 : 239.12 = 87.23 : x
  2. Step 2: Convert to fraction form
    159.41/239.12 = 87.23/x
  3. Step 3: Cross multiply
    159.41x = 239.12 × 87.23
  4. Step 4: Simplify right side
    159.41x = 20,858.44
  5. Step 5: Solve for x
    x = 20,858.44/159.41
  6. Step 6: Final answer
    x = 130.85

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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.