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Finding the Fourth Proportional to 256,726.62, 385,100.82 and 79,229.70

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Solution

The fourth proportional to 256,726.62, 385,100.82 and 79,229.70 is: 118,847.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,726.62 : 385,100.82 = 79,229.70 : x
  2. Step 2: Convert to fraction form
    256,726.62/385,100.82 = 79,229.70/x
  3. Step 3: Cross multiply
    256,726.62x = 385,100.82 × 79,229.70
  4. Step 4: Simplify right side
    256,726.62x = 30,511,422,438.35
  5. Step 5: Solve for x
    x = 30,511,422,438.35/256,726.62
  6. Step 6: Final answer
    x = 118,847.91

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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.