Home / 81,116.68-111,879.36-69,805.24

Finding the Fourth Proportional to 81,116.68, 111,879.36 and 69,805.24

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Solution

The fourth proportional to 81,116.68, 111,879.36 and 69,805.24 is: 96,278.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,116.68 : 111,879.36 = 69,805.24 : x
  2. Step 2: Convert to fraction form
    81,116.68/111,879.36 = 69,805.24/x
  3. Step 3: Cross multiply
    81,116.68x = 111,879.36 × 69,805.24
  4. Step 4: Simplify right side
    81,116.68x = 7,809,765,575.85
  5. Step 5: Solve for x
    x = 7,809,765,575.85/81,116.68
  6. Step 6: Final answer
    x = 96,278.17

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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.