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Finding the Fourth Proportional to 221,578.92, 332,542.80 and 81,377.64

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Solution

The fourth proportional to 221,578.92, 332,542.80 and 81,377.64 is: 122,130.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,578.92 : 332,542.80 = 81,377.64 : x
  2. Step 2: Convert to fraction form
    221,578.92/332,542.80 = 81,377.64/x
  3. Step 3: Cross multiply
    221,578.92x = 332,542.80 × 81,377.64
  4. Step 4: Simplify right side
    221,578.92x = 27,061,548,262.99
  5. Step 5: Solve for x
    x = 27,061,548,262.99/221,578.92
  6. Step 6: Final answer
    x = 122,130.52

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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.