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Finding the Fourth Proportional to 273,891.20, 410,868.80 and 86,921.60

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Solution

The fourth proportional to 273,891.20, 410,868.80 and 86,921.60 is: 130,392.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,891.20 : 410,868.80 = 86,921.60 : x
  2. Step 2: Convert to fraction form
    273,891.20/410,868.80 = 86,921.60/x
  3. Step 3: Cross multiply
    273,891.20x = 410,868.80 × 86,921.60
  4. Step 4: Simplify right side
    273,891.20x = 35,713,373,486.08
  5. Step 5: Solve for x
    x = 35,713,373,486.08/273,891.20
  6. Step 6: Final answer
    x = 130,392.56

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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.