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Finding the Fourth Proportional to 126,093.80, 189,140.70 and 72,949.70

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Solution

The fourth proportional to 126,093.80, 189,140.70 and 72,949.70 is: 109,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,093.80 : 189,140.70 = 72,949.70 : x
  2. Step 2: Convert to fraction form
    126,093.80/189,140.70 = 72,949.70/x
  3. Step 3: Cross multiply
    126,093.80x = 189,140.70 × 72,949.70
  4. Step 4: Simplify right side
    126,093.80x = 13,797,757,322.79
  5. Step 5: Solve for x
    x = 13,797,757,322.79/126,093.80
  6. Step 6: Final answer
    x = 109,424.55

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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.