Home / 81,321.47-121,951.86-27,998.38

Finding the Fourth Proportional to 81,321.47, 121,951.86 and 27,998.38

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Solution

The fourth proportional to 81,321.47, 121,951.86 and 27,998.38 is: 41,987.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,321.47 : 121,951.86 = 27,998.38 : x
  2. Step 2: Convert to fraction form
    81,321.47/121,951.86 = 27,998.38/x
  3. Step 3: Cross multiply
    81,321.47x = 121,951.86 × 27,998.38
  4. Step 4: Simplify right side
    81,321.47x = 3,414,454,389.27
  5. Step 5: Solve for x
    x = 3,414,454,389.27/81,321.47
  6. Step 6: Final answer
    x = 41,987.12

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1.5x scale

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.