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Finding the Fourth Proportional to 179.13, 247.31 and 137.60

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Solution

The fourth proportional to 179.13, 247.31 and 137.60 is: 189.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.13 : 247.31 = 137.60 : x
  2. Step 2: Convert to fraction form
    179.13/247.31 = 137.60/x
  3. Step 3: Cross multiply
    179.13x = 247.31 × 137.60
  4. Step 4: Simplify right side
    179.13x = 34,029.17
  5. Step 5: Solve for x
    x = 34,029.17/179.13
  6. Step 6: Final answer
    x = 189.97

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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.