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Finding the Fourth Proportional to 136,772.97, 188,520.73 and 91,434.39

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Solution

The fourth proportional to 136,772.97, 188,520.73 and 91,434.39 is: 126,028.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,772.97 : 188,520.73 = 91,434.39 : x
  2. Step 2: Convert to fraction form
    136,772.97/188,520.73 = 91,434.39/x
  3. Step 3: Cross multiply
    136,772.97x = 188,520.73 × 91,434.39
  4. Step 4: Simplify right side
    136,772.97x = 17,237,277,949.90
  5. Step 5: Solve for x
    x = 17,237,277,949.90/136,772.97
  6. Step 6: Final answer
    x = 126,028.40

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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.