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Finding the Fourth Proportional to 139,232.94, 192,126.78 and 78,793.98

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Solution

The fourth proportional to 139,232.94, 192,126.78 and 78,793.98 is: 108,727.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,232.94 : 192,126.78 = 78,793.98 : x
  2. Step 2: Convert to fraction form
    139,232.94/192,126.78 = 78,793.98/x
  3. Step 3: Cross multiply
    139,232.94x = 192,126.78 × 78,793.98
  4. Step 4: Simplify right side
    139,232.94x = 15,138,433,660.78
  5. Step 5: Solve for x
    x = 15,138,433,660.78/139,232.94
  6. Step 6: Final answer
    x = 108,727.39

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1.5x scale

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.