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Finding the Fourth Proportional to 221,107.80, 331,661.70 and 54,895.80

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Solution

The fourth proportional to 221,107.80, 331,661.70 and 54,895.80 is: 82,343.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,107.80 : 331,661.70 = 54,895.80 : x
  2. Step 2: Convert to fraction form
    221,107.80/331,661.70 = 54,895.80/x
  3. Step 3: Cross multiply
    221,107.80x = 331,661.70 × 54,895.80
  4. Step 4: Simplify right side
    221,107.80x = 18,206,834,350.86
  5. Step 5: Solve for x
    x = 18,206,834,350.86/221,107.80
  6. Step 6: Final answer
    x = 82,343.70

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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.