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Finding the Fourth Proportional to 78,677.52, 117,945.39 and 28,722.54

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Solution

The fourth proportional to 78,677.52, 117,945.39 and 28,722.54 is: 43,057.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,677.52 : 117,945.39 = 28,722.54 : x
  2. Step 2: Convert to fraction form
    78,677.52/117,945.39 = 28,722.54/x
  3. Step 3: Cross multiply
    78,677.52x = 117,945.39 × 28,722.54
  4. Step 4: Simplify right side
    78,677.52x = 3,387,691,182.09
  5. Step 5: Solve for x
    x = 3,387,691,182.09/78,677.52
  6. Step 6: Final answer
    x = 43,057.93

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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.