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Finding the Fourth Proportional to 208,481.57, 312,722.81 and 75,361.61

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Solution

The fourth proportional to 208,481.57, 312,722.81 and 75,361.61 is: 113,042.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,481.57 : 312,722.81 = 75,361.61 : x
  2. Step 2: Convert to fraction form
    208,481.57/312,722.81 = 75,361.61/x
  3. Step 3: Cross multiply
    208,481.57x = 312,722.81 × 75,361.61
  4. Step 4: Simplify right side
    208,481.57x = 23,567,292,504.90
  5. Step 5: Solve for x
    x = 23,567,292,504.90/208,481.57
  6. Step 6: Final answer
    x = 113,042.57

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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.