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Finding the Fourth Proportional to 78,308.39, 117,380.17 and 49,866.97

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Solution

The fourth proportional to 78,308.39, 117,380.17 and 49,866.97 is: 74,747.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,308.39 : 117,380.17 = 49,866.97 : x
  2. Step 2: Convert to fraction form
    78,308.39/117,380.17 = 49,866.97/x
  3. Step 3: Cross multiply
    78,308.39x = 117,380.17 × 49,866.97
  4. Step 4: Simplify right side
    78,308.39x = 5,853,393,415.98
  5. Step 5: Solve for x
    x = 5,853,393,415.98/78,308.39
  6. Step 6: Final answer
    x = 74,747.97

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1.5x scale

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.