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Finding the Fourth Proportional to 78,338.56, 116,761.16 and 73,910.56

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Solution

The fourth proportional to 78,338.56, 116,761.16 and 73,910.56 is: 110,161.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,338.56 : 116,761.16 = 73,910.56 : x
  2. Step 2: Convert to fraction form
    78,338.56/116,761.16 = 73,910.56/x
  3. Step 3: Cross multiply
    78,338.56x = 116,761.16 × 73,910.56
  4. Step 4: Simplify right side
    78,338.56x = 8,629,882,721.85
  5. Step 5: Solve for x
    x = 8,629,882,721.85/78,338.56
  6. Step 6: Final answer
    x = 110,161.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.