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Finding the Fourth Proportional to 321,120.72, 481,417.92 and 121,327.44

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Solution

The fourth proportional to 321,120.72, 481,417.92 and 121,327.44 is: 181,891.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,120.72 : 481,417.92 = 121,327.44 : x
  2. Step 2: Convert to fraction form
    321,120.72/481,417.92 = 121,327.44/x
  3. Step 3: Cross multiply
    321,120.72x = 481,417.92 × 121,327.44
  4. Step 4: Simplify right side
    321,120.72x = 58,409,203,803.72
  5. Step 5: Solve for x
    x = 58,409,203,803.72/321,120.72
  6. Step 6: Final answer
    x = 181,891.73

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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.