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Finding the Fourth Proportional to 139,555.84, 192,489.48 and 91,793.92

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Solution

The fourth proportional to 139,555.84, 192,489.48 and 91,793.92 is: 126,611.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,555.84 : 192,489.48 = 91,793.92 : x
  2. Step 2: Convert to fraction form
    139,555.84/192,489.48 = 91,793.92/x
  3. Step 3: Cross multiply
    139,555.84x = 192,489.48 × 91,793.92
  4. Step 4: Simplify right side
    139,555.84x = 17,669,363,927.96
  5. Step 5: Solve for x
    x = 17,669,363,927.96/139,555.84
  6. Step 6: Final answer
    x = 126,611.43

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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.