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Finding the Fourth Proportional to 321,203.91, 481,619.10 and 121,539.72

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Solution

The fourth proportional to 321,203.91, 481,619.10 and 121,539.72 is: 182,238.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,203.91 : 481,619.10 = 121,539.72 : x
  2. Step 2: Convert to fraction form
    321,203.91/481,619.10 = 121,539.72/x
  3. Step 3: Cross multiply
    321,203.91x = 481,619.10 × 121,539.72
  4. Step 4: Simplify right side
    321,203.91x = 58,535,850,560.65
  5. Step 5: Solve for x
    x = 58,535,850,560.65/321,203.91
  6. Step 6: Final answer
    x = 182,238.91

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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.