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Finding the Fourth Proportional to 179.71, 248.32 and 140.47

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Solution

The fourth proportional to 179.71, 248.32 and 140.47 is: 194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.71 : 248.32 = 140.47 : x
  2. Step 2: Convert to fraction form
    179.71/248.32 = 140.47/x
  3. Step 3: Cross multiply
    179.71x = 248.32 × 140.47
  4. Step 4: Simplify right side
    179.71x = 34,879.92
  5. Step 5: Solve for x
    x = 34,879.92/179.71
  6. Step 6: Final answer
    x = 194.10

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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.