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Finding the Fourth Proportional to 63,640.50, 95,436.74 and 51,129.78

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Solution

The fourth proportional to 63,640.50, 95,436.74 and 51,129.78 is: 76,675.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,640.50 : 95,436.74 = 51,129.78 : x
  2. Step 2: Convert to fraction form
    63,640.50/95,436.74 = 51,129.78/x
  3. Step 3: Cross multiply
    63,640.50x = 95,436.74 × 51,129.78
  4. Step 4: Simplify right side
    63,640.50x = 4,879,659,520.12
  5. Step 5: Solve for x
    x = 4,879,659,520.12/63,640.50
  6. Step 6: Final answer
    x = 76,675.38

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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.