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Finding the Fourth Proportional to 136,879.56, 188,895.24 and 80,291.88

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Solution

The fourth proportional to 136,879.56, 188,895.24 and 80,291.88 is: 110,803.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,879.56 : 188,895.24 = 80,291.88 : x
  2. Step 2: Convert to fraction form
    136,879.56/188,895.24 = 80,291.88/x
  3. Step 3: Cross multiply
    136,879.56x = 188,895.24 × 80,291.88
  4. Step 4: Simplify right side
    136,879.56x = 15,166,753,942.65
  5. Step 5: Solve for x
    x = 15,166,753,942.65/136,879.56
  6. Step 6: Final answer
    x = 110,803.64

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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.