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Finding the Fourth Proportional to 78,761.44, 118,107.60 and 28,828.60

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Solution

The fourth proportional to 78,761.44, 118,107.60 and 28,828.60 is: 43,230.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,761.44 : 118,107.60 = 28,828.60 : x
  2. Step 2: Convert to fraction form
    78,761.44/118,107.60 = 28,828.60/x
  3. Step 3: Cross multiply
    78,761.44x = 118,107.60 × 28,828.60
  4. Step 4: Simplify right side
    78,761.44x = 3,404,876,757.36
  5. Step 5: Solve for x
    x = 3,404,876,757.36/78,761.44
  6. Step 6: Final answer
    x = 43,230.25

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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.