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Finding the Fourth Proportional to 139,467.78, 209,960.52 and 127,067.46

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Solution

The fourth proportional to 139,467.78, 209,960.52 and 127,067.46 is: 191,292.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,467.78 : 209,960.52 = 127,067.46 : x
  2. Step 2: Convert to fraction form
    139,467.78/209,960.52 = 127,067.46/x
  3. Step 3: Cross multiply
    139,467.78x = 209,960.52 × 127,067.46
  4. Step 4: Simplify right side
    139,467.78x = 26,679,149,976.68
  5. Step 5: Solve for x
    x = 26,679,149,976.68/139,467.78
  6. Step 6: Final answer
    x = 191,292.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.