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Finding the Fourth Proportional to 321,138.60, 481,562.10 and 121,392.60

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Solution

The fourth proportional to 321,138.60, 481,562.10 and 121,392.60 is: 182,033.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,138.60 : 481,562.10 = 121,392.60 : x
  2. Step 2: Convert to fraction form
    321,138.60/481,562.10 = 121,392.60/x
  3. Step 3: Cross multiply
    321,138.60x = 481,562.10 × 121,392.60
  4. Step 4: Simplify right side
    321,138.60x = 58,458,075,380.46
  5. Step 5: Solve for x
    x = 58,458,075,380.46/321,138.60
  6. Step 6: Final answer
    x = 182,033.79

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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.