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Finding the Fourth Proportional to 299,876.76, 449,665.92 and 100,128.60

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Solution

The fourth proportional to 299,876.76, 449,665.92 and 100,128.60 is: 150,143.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,876.76 : 449,665.92 = 100,128.60 : x
  2. Step 2: Convert to fraction form
    299,876.76/449,665.92 = 100,128.60/x
  3. Step 3: Cross multiply
    299,876.76x = 449,665.92 × 100,128.60
  4. Step 4: Simplify right side
    299,876.76x = 45,024,419,037.31
  5. Step 5: Solve for x
    x = 45,024,419,037.31/299,876.76
  6. Step 6: Final answer
    x = 150,143.08

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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.