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Finding the Fourth Proportional to 329,989.80, 494,992.38 and 80,673.96

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Solution

The fourth proportional to 329,989.80, 494,992.38 and 80,673.96 is: 121,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,989.80 : 494,992.38 = 80,673.96 : x
  2. Step 2: Convert to fraction form
    329,989.80/494,992.38 = 80,673.96/x
  3. Step 3: Cross multiply
    329,989.80x = 494,992.38 × 80,673.96
  4. Step 4: Simplify right side
    329,989.80x = 39,932,995,464.42
  5. Step 5: Solve for x
    x = 39,932,995,464.42/329,989.80
  6. Step 6: Final answer
    x = 121,012.82

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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.