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Finding the Fourth Proportional to 80,362.48, 120,529.96 and 21,198.72

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Solution

The fourth proportional to 80,362.48, 120,529.96 and 21,198.72 is: 31,794.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,362.48 : 120,529.96 = 21,198.72 : x
  2. Step 2: Convert to fraction form
    80,362.48/120,529.96 = 21,198.72/x
  3. Step 3: Cross multiply
    80,362.48x = 120,529.96 × 21,198.72
  4. Step 4: Simplify right side
    80,362.48x = 2,555,080,873.65
  5. Step 5: Solve for x
    x = 2,555,080,873.65/80,362.48
  6. Step 6: Final answer
    x = 31,794.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.