Home / 90,857.82-136,287.25-80,908.68

Finding the Fourth Proportional to 90,857.82, 136,287.25 and 80,908.68

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Solution

The fourth proportional to 90,857.82, 136,287.25 and 80,908.68 is: 121,363.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857.82 : 136,287.25 = 80,908.68 : x
  2. Step 2: Convert to fraction form
    90,857.82/136,287.25 = 80,908.68/x
  3. Step 3: Cross multiply
    90,857.82x = 136,287.25 × 80,908.68
  4. Step 4: Simplify right side
    90,857.82x = 11,026,821,498.33
  5. Step 5: Solve for x
    x = 11,026,821,498.33/90,857.82
  6. Step 6: Final answer
    x = 121,363.48

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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.