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Finding the Fourth Proportional to 139,063.41, 191,906.15 and 75,400.11

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Solution

The fourth proportional to 139,063.41, 191,906.15 and 75,400.11 is: 104,051.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,063.41 : 191,906.15 = 75,400.11 : x
  2. Step 2: Convert to fraction form
    139,063.41/191,906.15 = 75,400.11/x
  3. Step 3: Cross multiply
    139,063.41x = 191,906.15 × 75,400.11
  4. Step 4: Simplify right side
    139,063.41x = 14,469,744,442.68
  5. Step 5: Solve for x
    x = 14,469,744,442.68/139,063.41
  6. Step 6: Final answer
    x = 104,051.41

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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.