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Finding the Fourth Proportional to 78,791.67, 118,209.38 and 43,755.93

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Solution

The fourth proportional to 78,791.67, 118,209.38 and 43,755.93 is: 65,646.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,791.67 : 118,209.38 = 43,755.93 : x
  2. Step 2: Convert to fraction form
    78,791.67/118,209.38 = 43,755.93/x
  3. Step 3: Cross multiply
    78,791.67x = 118,209.38 × 43,755.93
  4. Step 4: Simplify right side
    78,791.67x = 5,172,361,137.84
  5. Step 5: Solve for x
    x = 5,172,361,137.84/78,791.67
  6. Step 6: Final answer
    x = 65,646.04

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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.