Home / 81,249.46-111,890.35-66,971.09

Finding the Fourth Proportional to 81,249.46, 111,890.35 and 66,971.09

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Solution

The fourth proportional to 81,249.46, 111,890.35 and 66,971.09 is: 92,227.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,249.46 : 111,890.35 = 66,971.09 : x
  2. Step 2: Convert to fraction form
    81,249.46/111,890.35 = 66,971.09/x
  3. Step 3: Cross multiply
    81,249.46x = 111,890.35 × 66,971.09
  4. Step 4: Simplify right side
    81,249.46x = 7,493,418,699.98
  5. Step 5: Solve for x
    x = 7,493,418,699.98/81,249.46
  6. Step 6: Final answer
    x = 92,227.30

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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.