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Finding the Fourth Proportional to 221,129.84, 331,591.02 and 80,790.32

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Solution

The fourth proportional to 221,129.84, 331,591.02 and 80,790.32 is: 121,147.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,129.84 : 331,591.02 = 80,790.32 : x
  2. Step 2: Convert to fraction form
    221,129.84/331,591.02 = 80,790.32/x
  3. Step 3: Cross multiply
    221,129.84x = 331,591.02 × 80,790.32
  4. Step 4: Simplify right side
    221,129.84x = 26,789,344,614.93
  5. Step 5: Solve for x
    x = 26,789,344,614.93/221,129.84
  6. Step 6: Final answer
    x = 121,147.58

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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.