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Finding the Fourth Proportional to 179.25, 247.31 and 105.51

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Solution

The fourth proportional to 179.25, 247.31 and 105.51 is: 145.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.25 : 247.31 = 105.51 : x
  2. Step 2: Convert to fraction form
    179.25/247.31 = 105.51/x
  3. Step 3: Cross multiply
    179.25x = 247.31 × 105.51
  4. Step 4: Simplify right side
    179.25x = 26,093.68
  5. Step 5: Solve for x
    x = 26,093.68/179.25
  6. Step 6: Final answer
    x = 145.57

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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.