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Finding the Fourth Proportional to 103,879.92, 155,696.82 and 47,672.66

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Solution

The fourth proportional to 103,879.92, 155,696.82 and 47,672.66 is: 71,452.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,879.92 : 155,696.82 = 47,672.66 : x
  2. Step 2: Convert to fraction form
    103,879.92/155,696.82 = 47,672.66/x
  3. Step 3: Cross multiply
    103,879.92x = 155,696.82 × 47,672.66
  4. Step 4: Simplify right side
    103,879.92x = 7,422,481,562.94
  5. Step 5: Solve for x
    x = 7,422,481,562.94/103,879.92
  6. Step 6: Final answer
    x = 71,452.52

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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.