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Finding the Fourth Proportional to 126,133.39, 188,813.69 and 81,671.68

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Solution

The fourth proportional to 126,133.39, 188,813.69 and 81,671.68 is: 122,257.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,133.39 : 188,813.69 = 81,671.68 : x
  2. Step 2: Convert to fraction form
    126,133.39/188,813.69 = 81,671.68/x
  3. Step 3: Cross multiply
    126,133.39x = 188,813.69 × 81,671.68
  4. Step 4: Simplify right side
    126,133.39x = 15,420,731,269.30
  5. Step 5: Solve for x
    x = 15,420,731,269.30/126,133.39
  6. Step 6: Final answer
    x = 122,257.33

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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.