Home / 81,310.34-121,961.64-33,905.90

Finding the Fourth Proportional to 81,310.34, 121,961.64 and 33,905.90

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Solution

The fourth proportional to 81,310.34, 121,961.64 and 33,905.90 is: 50,857.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,310.34 : 121,961.64 = 33,905.90 : x
  2. Step 2: Convert to fraction form
    81,310.34/121,961.64 = 33,905.90/x
  3. Step 3: Cross multiply
    81,310.34x = 121,961.64 × 33,905.90
  4. Step 4: Simplify right side
    81,310.34x = 4,135,219,169.68
  5. Step 5: Solve for x
    x = 4,135,219,169.68/81,310.34
  6. Step 6: Final answer
    x = 50,857.24

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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.