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Finding the Fourth Proportional to 214,362.40, 321,446.40 and 81,198.40

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Solution

The fourth proportional to 214,362.40, 321,446.40 and 81,198.40 is: 121,760.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,362.40 : 321,446.40 = 81,198.40 : x
  2. Step 2: Convert to fraction form
    214,362.40/321,446.40 = 81,198.40/x
  3. Step 3: Cross multiply
    214,362.40x = 321,446.40 × 81,198.40
  4. Step 4: Simplify right side
    214,362.40x = 26,100,933,365.76
  5. Step 5: Solve for x
    x = 26,100,933,365.76/214,362.40
  6. Step 6: Final answer
    x = 121,760.78

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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.