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Finding the Fourth Proportional to 139,793.52, 192,930.48 and 86,067.84

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Solution

The fourth proportional to 139,793.52, 192,930.48 and 86,067.84 is: 118,783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,793.52 : 192,930.48 = 86,067.84 : x
  2. Step 2: Convert to fraction form
    139,793.52/192,930.48 = 86,067.84/x
  3. Step 3: Cross multiply
    139,793.52x = 192,930.48 × 86,067.84
  4. Step 4: Simplify right side
    139,793.52x = 16,605,109,683.76
  5. Step 5: Solve for x
    x = 16,605,109,683.76/139,793.52
  6. Step 6: Final answer
    x = 118,783.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.