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Finding the Fourth Proportional to 273,604.20, 410,367.90 and 86,634.60

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Solution

The fourth proportional to 273,604.20, 410,367.90 and 86,634.60 is: 129,939.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,604.20 : 410,367.90 = 86,634.60 : x
  2. Step 2: Convert to fraction form
    273,604.20/410,367.90 = 86,634.60/x
  3. Step 3: Cross multiply
    273,604.20x = 410,367.90 × 86,634.60
  4. Step 4: Simplify right side
    273,604.20x = 35,552,058,869.34
  5. Step 5: Solve for x
    x = 35,552,058,869.34/273,604.20
  6. Step 6: Final answer
    x = 129,939.74

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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.