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Finding the Fourth Proportional to 279,901.20, 419,745.40 and 90,333.15

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Solution

The fourth proportional to 279,901.20, 419,745.40 and 90,333.15 is: 135,465.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,901.20 : 419,745.40 = 90,333.15 : x
  2. Step 2: Convert to fraction form
    279,901.20/419,745.40 = 90,333.15/x
  3. Step 3: Cross multiply
    279,901.20x = 419,745.40 × 90,333.15
  4. Step 4: Simplify right side
    279,901.20x = 37,916,924,180.01
  5. Step 5: Solve for x
    x = 37,916,924,180.01/279,901.20
  6. Step 6: Final answer
    x = 135,465.39

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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.