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Finding the Fourth Proportional to 179.24, 247.29 and 113.72

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Solution

The fourth proportional to 179.24, 247.29 and 113.72 is: 156.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.24 : 247.29 = 113.72 : x
  2. Step 2: Convert to fraction form
    179.24/247.29 = 113.72/x
  3. Step 3: Cross multiply
    179.24x = 247.29 × 113.72
  4. Step 4: Simplify right side
    179.24x = 28,121.82
  5. Step 5: Solve for x
    x = 28,121.82/179.24
  6. Step 6: Final answer
    x = 156.89

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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.