Home / 81,169.49-121,781.23-51,149.04

Finding the Fourth Proportional to 81,169.49, 121,781.23 and 51,149.04

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Solution

The fourth proportional to 81,169.49, 121,781.23 and 51,149.04 is: 76,740.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,169.49 : 121,781.23 = 51,149.04 : x
  2. Step 2: Convert to fraction form
    81,169.49/121,781.23 = 51,149.04/x
  3. Step 3: Cross multiply
    81,169.49x = 121,781.23 × 51,149.04
  4. Step 4: Simplify right side
    81,169.49x = 6,228,993,004.52
  5. Step 5: Solve for x
    x = 6,228,993,004.52/81,169.49
  6. Step 6: Final answer
    x = 76,740.57

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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.