Home / 123,856.20-170,992.49-81,537.75

Finding the Fourth Proportional to 123,856.20, 170,992.49 and 81,537.75

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Solution

The fourth proportional to 123,856.20, 170,992.49 and 81,537.75 is: 112,568.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,856.20 : 170,992.49 = 81,537.75 : x
  2. Step 2: Convert to fraction form
    123,856.20/170,992.49 = 81,537.75/x
  3. Step 3: Cross multiply
    123,856.20x = 170,992.49 × 81,537.75
  4. Step 4: Simplify right side
    123,856.20x = 13,942,342,493.81
  5. Step 5: Solve for x
    x = 13,942,342,493.81/123,856.20
  6. Step 6: Final answer
    x = 112,568.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.