Home / 90,627,005.20-135,940,507.80-81,557,078.80

Finding the Fourth Proportional to 90,627,005.20, 135,940,507.80 and 81,557,078.80

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Solution

The fourth proportional to 90,627,005.20, 135,940,507.80 and 81,557,078.80 is: 122,335,618.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,627,005.20 : 135,940,507.80 = 81,557,078.80 : x
  2. Step 2: Convert to fraction form
    90,627,005.20/135,940,507.80 = 81,557,078.80/x
  3. Step 3: Cross multiply
    90,627,005.20x = 135,940,507.80 × 81,557,078.80
  4. Step 4: Simplify right side
    90,627,005.20x = 11,086,910,706,756,616
  5. Step 5: Solve for x
    x = 11,086,910,706,756,616/90,627,005.20
  6. Step 6: Final answer
    x = 122,335,618.20

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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.