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Finding the Fourth Proportional to 221,103.80, 331,623.30 and 108,753.86

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Solution

The fourth proportional to 221,103.80, 331,623.30 and 108,753.86 is: 163,114.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,103.80 : 331,623.30 = 108,753.86 : x
  2. Step 2: Convert to fraction form
    221,103.80/331,623.30 = 108,753.86/x
  3. Step 3: Cross multiply
    221,103.80x = 331,623.30 × 108,753.86
  4. Step 4: Simplify right side
    221,103.80x = 36,065,312,568.11
  5. Step 5: Solve for x
    x = 36,065,312,568.11/221,103.80
  6. Step 6: Final answer
    x = 163,114.85

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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.