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Finding the Fourth Proportional to 66,787.95, 100,183.21 and 31,229.66

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Solution

The fourth proportional to 66,787.95, 100,183.21 and 31,229.66 is: 46,845.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,787.95 : 100,183.21 = 31,229.66 : x
  2. Step 2: Convert to fraction form
    66,787.95/100,183.21 = 31,229.66/x
  3. Step 3: Cross multiply
    66,787.95x = 100,183.21 × 31,229.66
  4. Step 4: Simplify right side
    66,787.95x = 3,128,687,085.09
  5. Step 5: Solve for x
    x = 3,128,687,085.09/66,787.95
  6. Step 6: Final answer
    x = 46,845.09

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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.