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Finding the Fourth Proportional to 111,828.97, 154,381.13 and 86,277.97

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Solution

The fourth proportional to 111,828.97, 154,381.13 and 86,277.97 is: 119,107.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,828.97 : 154,381.13 = 86,277.97 : x
  2. Step 2: Convert to fraction form
    111,828.97/154,381.13 = 86,277.97/x
  3. Step 3: Cross multiply
    111,828.97x = 154,381.13 × 86,277.97
  4. Step 4: Simplify right side
    111,828.97x = 13,319,690,502.71
  5. Step 5: Solve for x
    x = 13,319,690,502.71/111,828.97
  6. Step 6: Final answer
    x = 119,107.69

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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.