Home / 81,078.89-121,618.33-41,091.65

Finding the Fourth Proportional to 81,078.89, 121,618.33 and 41,091.65

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Solution

The fourth proportional to 81,078.89, 121,618.33 and 41,091.65 is: 61,637.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,078.89 : 121,618.33 = 41,091.65 : x
  2. Step 2: Convert to fraction form
    81,078.89/121,618.33 = 41,091.65/x
  3. Step 3: Cross multiply
    81,078.89x = 121,618.33 × 41,091.65
  4. Step 4: Simplify right side
    81,078.89x = 4,997,497,241.85
  5. Step 5: Solve for x
    x = 4,997,497,241.85/81,078.89
  6. Step 6: Final answer
    x = 61,637.46

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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.