Home / 81,662.12-121,997.05-51,841.16

Finding the Fourth Proportional to 81,662.12, 121,997.05 and 51,841.16

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Solution

The fourth proportional to 81,662.12, 121,997.05 and 51,841.16 is: 77,446.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,662.12 : 121,997.05 = 51,841.16 : x
  2. Step 2: Convert to fraction form
    81,662.12/121,997.05 = 51,841.16/x
  3. Step 3: Cross multiply
    81,662.12x = 121,997.05 × 51,841.16
  4. Step 4: Simplify right side
    81,662.12x = 6,324,468,588.58
  5. Step 5: Solve for x
    x = 6,324,468,588.58/81,662.12
  6. Step 6: Final answer
    x = 77,446.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.