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Finding the Fourth Proportional to 331,121.70, 496,691.67 and 120,916.26

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Solution

The fourth proportional to 331,121.70, 496,691.67 and 120,916.26 is: 181,377.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,121.70 : 496,691.67 = 120,916.26 : x
  2. Step 2: Convert to fraction form
    331,121.70/496,691.67 = 120,916.26/x
  3. Step 3: Cross multiply
    331,121.70x = 496,691.67 × 120,916.26
  4. Step 4: Simplify right side
    331,121.70x = 60,058,099,109.55
  5. Step 5: Solve for x
    x = 60,058,099,109.55/331,121.70
  6. Step 6: Final answer
    x = 181,377.72

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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.