Home / 137,172,209.20-189,454,755.78-90,338,639.36

Finding the Fourth Proportional to 137,172,209.20, 189,454,755.78 and 90,338,639.36

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Solution

The fourth proportional to 137,172,209.20, 189,454,755.78 and 90,338,639.36 is: 124,770,789.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,172,209.20 : 189,454,755.78 = 90,338,639.36 : x
  2. Step 2: Convert to fraction form
    137,172,209.20/189,454,755.78 = 90,338,639.36/x
  3. Step 3: Cross multiply
    137,172,209.20x = 189,454,755.78 × 90,338,639.36
  4. Step 4: Simplify right side
    137,172,209.20x = 17,115,084,857,446,296
  5. Step 5: Solve for x
    x = 17,115,084,857,446,296/137,172,209.20
  6. Step 6: Final answer
    x = 124,770,789.63

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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.