Home / 116,939.13-161,449.79-81,116.61

Finding the Fourth Proportional to 116,939.13, 161,449.79 and 81,116.61

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Solution

The fourth proportional to 116,939.13, 161,449.79 and 81,116.61 is: 111,992.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,939.13 : 161,449.79 = 81,116.61 : x
  2. Step 2: Convert to fraction form
    116,939.13/161,449.79 = 81,116.61/x
  3. Step 3: Cross multiply
    116,939.13x = 161,449.79 × 81,116.61
  4. Step 4: Simplify right side
    116,939.13x = 13,096,259,244.43
  5. Step 5: Solve for x
    x = 13,096,259,244.43/116,939.13
  6. Step 6: Final answer
    x = 111,992.10

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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.