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Finding the Fourth Proportional to 83,687.44, 126,106.84 and 69,221.92

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Solution

The fourth proportional to 83,687.44, 126,106.84 and 69,221.92 is: 104,309.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,687.44 : 126,106.84 = 69,221.92 : x
  2. Step 2: Convert to fraction form
    83,687.44/126,106.84 = 69,221.92/x
  3. Step 3: Cross multiply
    83,687.44x = 126,106.84 × 69,221.92
  4. Step 4: Simplify right side
    83,687.44x = 8,729,357,589.93
  5. Step 5: Solve for x
    x = 8,729,357,589.93/83,687.44
  6. Step 6: Final answer
    x = 104,309.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.