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Finding the Fourth Proportional to 220,813.70, 331,329.90 and 126,116.60

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Solution

The fourth proportional to 220,813.70, 331,329.90 and 126,116.60 is: 189,237.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,813.70 : 331,329.90 = 126,116.60 : x
  2. Step 2: Convert to fraction form
    220,813.70/331,329.90 = 126,116.60/x
  3. Step 3: Cross multiply
    220,813.70x = 331,329.90 × 126,116.60
  4. Step 4: Simplify right side
    220,813.70x = 41,786,200,466.34
  5. Step 5: Solve for x
    x = 41,786,200,466.34/220,813.70
  6. Step 6: Final answer
    x = 189,237.35

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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.