Home / 81,241.92-121,890.54-43,805.58

Finding the Fourth Proportional to 81,241.92, 121,890.54 and 43,805.58

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Solution

The fourth proportional to 81,241.92, 121,890.54 and 43,805.58 is: 65,723.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,241.92 : 121,890.54 = 43,805.58 : x
  2. Step 2: Convert to fraction form
    81,241.92/121,890.54 = 43,805.58/x
  3. Step 3: Cross multiply
    81,241.92x = 121,890.54 × 43,805.58
  4. Step 4: Simplify right side
    81,241.92x = 5,339,485,801.21
  5. Step 5: Solve for x
    x = 5,339,485,801.21/81,241.92
  6. Step 6: Final answer
    x = 65,723.28

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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.