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Finding the Fourth Proportional to 219,737.70, 329,715.90 and 86,622.30

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Solution

The fourth proportional to 219,737.70, 329,715.90 and 86,622.30 is: 129,976.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,737.70 : 329,715.90 = 86,622.30 : x
  2. Step 2: Convert to fraction form
    219,737.70/329,715.90 = 86,622.30/x
  3. Step 3: Cross multiply
    219,737.70x = 329,715.90 × 86,622.30
  4. Step 4: Simplify right side
    219,737.70x = 28,560,749,604.57
  5. Step 5: Solve for x
    x = 28,560,749,604.57/219,737.70
  6. Step 6: Final answer
    x = 129,976.56

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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.