Home / 81,322.12-121,953.20-27,998.92

Finding the Fourth Proportional to 81,322.12, 121,953.20 and 27,998.92

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Solution

The fourth proportional to 81,322.12, 121,953.20 and 27,998.92 is: 41,988.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,322.12 : 121,953.20 = 27,998.92 : x
  2. Step 2: Convert to fraction form
    81,322.12/121,953.20 = 27,998.92/x
  3. Step 3: Cross multiply
    81,322.12x = 121,953.20 × 27,998.92
  4. Step 4: Simplify right side
    81,322.12x = 3,414,557,890.54
  5. Step 5: Solve for x
    x = 3,414,557,890.54/81,322.12
  6. Step 6: Final answer
    x = 41,988.06

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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.