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Finding the Fourth Proportional to 84,512.97, 126,769.46 and 68,699.14

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Solution

The fourth proportional to 84,512.97, 126,769.46 and 68,699.14 is: 103,048.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,512.97 : 126,769.46 = 68,699.14 : x
  2. Step 2: Convert to fraction form
    84,512.97/126,769.46 = 68,699.14/x
  3. Step 3: Cross multiply
    84,512.97x = 126,769.46 × 68,699.14
  4. Step 4: Simplify right side
    84,512.97x = 8,708,952,219.85
  5. Step 5: Solve for x
    x = 8,708,952,219.85/84,512.97
  6. Step 6: Final answer
    x = 103,048.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.