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Finding the Fourth Proportional to 178.68, 246.27 and 139.27

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Solution

The fourth proportional to 178.68, 246.27 and 139.27 is: 191.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.68 : 246.27 = 139.27 : x
  2. Step 2: Convert to fraction form
    178.68/246.27 = 139.27/x
  3. Step 3: Cross multiply
    178.68x = 246.27 × 139.27
  4. Step 4: Simplify right side
    178.68x = 34,297.22
  5. Step 5: Solve for x
    x = 34,297.22/178.68
  6. Step 6: Final answer
    x = 191.95

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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.