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Finding the Fourth Proportional to 139,620.78, 192,677.13 and 75,958.56

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Solution

The fourth proportional to 139,620.78, 192,677.13 and 75,958.56 is: 104,823.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.78 : 192,677.13 = 75,958.56 : x
  2. Step 2: Convert to fraction form
    139,620.78/192,677.13 = 75,958.56/x
  3. Step 3: Cross multiply
    139,620.78x = 192,677.13 × 75,958.56
  4. Step 4: Simplify right side
    139,620.78x = 14,635,477,339.73
  5. Step 5: Solve for x
    x = 14,635,477,339.73/139,620.78
  6. Step 6: Final answer
    x = 104,823.06

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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.