Home / 116,939.88-161,450.82-81,117.36

Finding the Fourth Proportional to 116,939.88, 161,450.82 and 81,117.36

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Solution

The fourth proportional to 116,939.88, 161,450.82 and 81,117.36 is: 111,993.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,939.88 : 161,450.82 = 81,117.36 : x
  2. Step 2: Convert to fraction form
    116,939.88/161,450.82 = 81,117.36/x
  3. Step 3: Cross multiply
    116,939.88x = 161,450.82 × 81,117.36
  4. Step 4: Simplify right side
    116,939.88x = 13,096,464,288.24
  5. Step 5: Solve for x
    x = 13,096,464,288.24/116,939.88
  6. Step 6: Final answer
    x = 111,993.14

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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.