Home / 311,947.20-467,996.40-90,331.20

Finding the Fourth Proportional to 311,947.20, 467,996.40 and 90,331.20

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Solution

The fourth proportional to 311,947.20, 467,996.40 and 90,331.20 is: 135,518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,947.20 : 467,996.40 = 90,331.20 : x
  2. Step 2: Convert to fraction form
    311,947.20/467,996.40 = 90,331.20/x
  3. Step 3: Cross multiply
    311,947.20x = 467,996.40 × 90,331.20
  4. Step 4: Simplify right side
    311,947.20x = 42,274,676,407.68
  5. Step 5: Solve for x
    x = 42,274,676,407.68/311,947.20
  6. Step 6: Final answer
    x = 135,518.69

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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.