Home / 81,145.88-121,709.41-21,986.02

Finding the Fourth Proportional to 81,145.88, 121,709.41 and 21,986.02

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Solution

The fourth proportional to 81,145.88, 121,709.41 and 21,986.02 is: 32,976.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,145.88 : 121,709.41 = 21,986.02 : x
  2. Step 2: Convert to fraction form
    81,145.88/121,709.41 = 21,986.02/x
  3. Step 3: Cross multiply
    81,145.88x = 121,709.41 × 21,986.02
  4. Step 4: Simplify right side
    81,145.88x = 2,675,905,163.21
  5. Step 5: Solve for x
    x = 2,675,905,163.21/81,145.88
  6. Step 6: Final answer
    x = 32,976.47

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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.