Home / 116,939.64-161,450.48-81,117.12

Finding the Fourth Proportional to 116,939.64, 161,450.48 and 81,117.12

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Solution

The fourth proportional to 116,939.64, 161,450.48 and 81,117.12 is: 111,992.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,939.64 : 161,450.48 = 81,117.12 : x
  2. Step 2: Convert to fraction form
    116,939.64/161,450.48 = 81,117.12/x
  3. Step 3: Cross multiply
    116,939.64x = 161,450.48 × 81,117.12
  4. Step 4: Simplify right side
    116,939.64x = 13,096,397,960.22
  5. Step 5: Solve for x
    x = 13,096,397,960.22/116,939.64
  6. Step 6: Final answer
    x = 111,992.80

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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.