Home / 81,170.42-121,754.81-45,169.97

Finding the Fourth Proportional to 81,170.42, 121,754.81 and 45,169.97

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Solution

The fourth proportional to 81,170.42, 121,754.81 and 45,169.97 is: 67,754.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,170.42 : 121,754.81 = 45,169.97 : x
  2. Step 2: Convert to fraction form
    81,170.42/121,754.81 = 45,169.97/x
  3. Step 3: Cross multiply
    81,170.42x = 121,754.81 × 45,169.97
  4. Step 4: Simplify right side
    81,170.42x = 5,499,660,619.21
  5. Step 5: Solve for x
    x = 5,499,660,619.21/81,170.42
  6. Step 6: Final answer
    x = 67,754.50

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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.