Home / 81,236.16-111,856.68-71,107.92

Finding the Fourth Proportional to 81,236.16, 111,856.68 and 71,107.92

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Solution

The fourth proportional to 81,236.16, 111,856.68 and 71,107.92 is: 97,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,236.16 : 111,856.68 = 71,107.92 : x
  2. Step 2: Convert to fraction form
    81,236.16/111,856.68 = 71,107.92/x
  3. Step 3: Cross multiply
    81,236.16x = 111,856.68 × 71,107.92
  4. Step 4: Simplify right side
    81,236.16x = 7,953,895,852.91
  5. Step 5: Solve for x
    x = 7,953,895,852.91/81,236.16
  6. Step 6: Final answer
    x = 97,910.78

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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.