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Finding the Fourth Proportional to 140,571.73, 193,991.79 and 76,910.89

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Solution

The fourth proportional to 140,571.73, 193,991.79 and 76,910.89 is: 106,138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,571.73 : 193,991.79 = 76,910.89 : x
  2. Step 2: Convert to fraction form
    140,571.73/193,991.79 = 76,910.89/x
  3. Step 3: Cross multiply
    140,571.73x = 193,991.79 × 76,910.89
  4. Step 4: Simplify right side
    140,571.73x = 14,920,081,221.59
  5. Step 5: Solve for x
    x = 14,920,081,221.59/140,571.73
  6. Step 6: Final answer
    x = 106,138.56

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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.