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Finding the Fourth Proportional to 221,425.60, 331,911.60 and 108,932.80

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Solution

The fourth proportional to 221,425.60, 331,911.60 and 108,932.80 is: 163,287.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,425.60 : 331,911.60 = 108,932.80 : x
  2. Step 2: Convert to fraction form
    221,425.60/331,911.60 = 108,932.80/x
  3. Step 3: Cross multiply
    221,425.60x = 331,911.60 × 108,932.80
  4. Step 4: Simplify right side
    221,425.60x = 36,156,059,940.48
  5. Step 5: Solve for x
    x = 36,156,059,940.48/221,425.60
  6. Step 6: Final answer
    x = 163,287.62

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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.