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Finding the Fourth Proportional to 221,220.64, 331,937.76 and 108,839.92

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Solution

The fourth proportional to 221,220.64, 331,937.76 and 108,839.92 is: 163,312.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,220.64 : 331,937.76 = 108,839.92 : x
  2. Step 2: Convert to fraction form
    221,220.64/331,937.76 = 108,839.92/x
  3. Step 3: Cross multiply
    221,220.64x = 331,937.76 × 108,839.92
  4. Step 4: Simplify right side
    221,220.64x = 36,128,079,243.38
  5. Step 5: Solve for x
    x = 36,128,079,243.38/221,220.64
  6. Step 6: Final answer
    x = 163,312.43

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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.