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Finding the Fourth Proportional to 78,672.39, 117,983.07 and 26,067.75

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Solution

The fourth proportional to 78,672.39, 117,983.07 and 26,067.75 is: 39,093.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,672.39 : 117,983.07 = 26,067.75 : x
  2. Step 2: Convert to fraction form
    78,672.39/117,983.07 = 26,067.75/x
  3. Step 3: Cross multiply
    78,672.39x = 117,983.07 × 26,067.75
  4. Step 4: Simplify right side
    78,672.39x = 3,075,553,042.65
  5. Step 5: Solve for x
    x = 3,075,553,042.65/78,672.39
  6. Step 6: Final answer
    x = 39,093.17

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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.