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Finding the Fourth Proportional to 179.26, 247.31 and 112.87

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Solution

The fourth proportional to 179.26, 247.31 and 112.87 is: 155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.26 : 247.31 = 112.87 : x
  2. Step 2: Convert to fraction form
    179.26/247.31 = 112.87/x
  3. Step 3: Cross multiply
    179.26x = 247.31 × 112.87
  4. Step 4: Simplify right side
    179.26x = 27,913.88
  5. Step 5: Solve for x
    x = 27,913.88/179.26
  6. Step 6: Final answer
    x = 155.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.