Home / 123,249.36-170,083.62-66,660.78

Finding the Fourth Proportional to 123,249.36, 170,083.62 and 66,660.78

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Solution

The fourth proportional to 123,249.36, 170,083.62 and 66,660.78 is: 91,991.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,249.36 : 170,083.62 = 66,660.78 : x
  2. Step 2: Convert to fraction form
    123,249.36/170,083.62 = 66,660.78/x
  3. Step 3: Cross multiply
    123,249.36x = 170,083.62 × 66,660.78
  4. Step 4: Simplify right side
    123,249.36x = 11,337,906,774.42
  5. Step 5: Solve for x
    x = 11,337,906,774.42/123,249.36
  6. Step 6: Final answer
    x = 91,991.61

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1.5x scale

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.