Home / 81,171.45-121,757.22-53,115.12

Finding the Fourth Proportional to 81,171.45, 121,757.22 and 53,115.12

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Solution

The fourth proportional to 81,171.45, 121,757.22 and 53,115.12 is: 79,672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,171.45 : 121,757.22 = 53,115.12 : x
  2. Step 2: Convert to fraction form
    81,171.45/121,757.22 = 53,115.12/x
  3. Step 3: Cross multiply
    81,171.45x = 121,757.22 × 53,115.12
  4. Step 4: Simplify right side
    81,171.45x = 6,467,149,351.17
  5. Step 5: Solve for x
    x = 6,467,149,351.17/81,171.45
  6. Step 6: Final answer
    x = 79,672.71

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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.