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Finding the Fourth Proportional to 208,372.21, 287,553.39 and 112,879.30

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Solution

The fourth proportional to 208,372.21, 287,553.39 and 112,879.30 is: 155,773.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,372.21 : 287,553.39 = 112,879.30 : x
  2. Step 2: Convert to fraction form
    208,372.21/287,553.39 = 112,879.30/x
  3. Step 3: Cross multiply
    208,372.21x = 287,553.39 × 112,879.30
  4. Step 4: Simplify right side
    208,372.21x = 32,458,825,375.83
  5. Step 5: Solve for x
    x = 32,458,825,375.83/208,372.21
  6. Step 6: Final answer
    x = 155,773.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.