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Finding the Fourth Proportional to 179.18, 246.96 and 139.77

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Solution

The fourth proportional to 179.18, 246.96 and 139.77 is: 192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.18 : 246.96 = 139.77 : x
  2. Step 2: Convert to fraction form
    179.18/246.96 = 139.77/x
  3. Step 3: Cross multiply
    179.18x = 246.96 × 139.77
  4. Step 4: Simplify right side
    179.18x = 34,516.90
  5. Step 5: Solve for x
    x = 34,516.90/179.18
  6. Step 6: Final answer
    x = 192.64

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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.