Home / 81,229.62-111,986.64-56,997.66

Finding the Fourth Proportional to 81,229.62, 111,986.64 and 56,997.66

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Solution

The fourth proportional to 81,229.62, 111,986.64 and 56,997.66 is: 78,579.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,229.62 : 111,986.64 = 56,997.66 : x
  2. Step 2: Convert to fraction form
    81,229.62/111,986.64 = 56,997.66/x
  3. Step 3: Cross multiply
    81,229.62x = 111,986.64 × 56,997.66
  4. Step 4: Simplify right side
    81,229.62x = 6,382,976,431.26
  5. Step 5: Solve for x
    x = 6,382,976,431.26/81,229.62
  6. Step 6: Final answer
    x = 78,579.42

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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.