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Finding the Fourth Proportional to 136,911.43, 188,936.87 and 76,481.54

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Solution

The fourth proportional to 136,911.43, 188,936.87 and 76,481.54 is: 105,544.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,911.43 : 188,936.87 = 76,481.54 : x
  2. Step 2: Convert to fraction form
    136,911.43/188,936.87 = 76,481.54/x
  3. Step 3: Cross multiply
    136,911.43x = 188,936.87 × 76,481.54
  4. Step 4: Simplify right side
    136,911.43x = 14,450,182,592.01
  5. Step 5: Solve for x
    x = 14,450,182,592.01/136,911.43
  6. Step 6: Final answer
    x = 105,544.02

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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.