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Finding the Fourth Proportional to 259,702.20, 389,626.20 and 126,586.80

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Solution

The fourth proportional to 259,702.20, 389,626.20 and 126,586.80 is: 189,915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,702.20 : 389,626.20 = 126,586.80 : x
  2. Step 2: Convert to fraction form
    259,702.20/389,626.20 = 126,586.80/x
  3. Step 3: Cross multiply
    259,702.20x = 389,626.20 × 126,586.80
  4. Step 4: Simplify right side
    259,702.20x = 49,321,533,854.16
  5. Step 5: Solve for x
    x = 49,321,533,854.16/259,702.20
  6. Step 6: Final answer
    x = 189,915.73

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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.