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Finding the Fourth Proportional to 331,540.80, 497,311.17 and 121,178.73

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Solution

The fourth proportional to 331,540.80, 497,311.17 and 121,178.73 is: 181,768.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,540.80 : 497,311.17 = 121,178.73 : x
  2. Step 2: Convert to fraction form
    331,540.80/497,311.17 = 121,178.73/x
  3. Step 3: Cross multiply
    331,540.80x = 497,311.17 × 121,178.73
  4. Step 4: Simplify right side
    331,540.80x = 60,263,535,995.41
  5. Step 5: Solve for x
    x = 60,263,535,995.41/331,540.80
  6. Step 6: Final answer
    x = 181,768.08

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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.