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Finding the Fourth Proportional to 111,554.28, 166,913.17 and 66,410.51

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Solution

The fourth proportional to 111,554.28, 166,913.17 and 66,410.51 is: 99,366.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,554.28 : 166,913.17 = 66,410.51 : x
  2. Step 2: Convert to fraction form
    111,554.28/166,913.17 = 66,410.51/x
  3. Step 3: Cross multiply
    111,554.28x = 166,913.17 × 66,410.51
  4. Step 4: Simplify right side
    111,554.28x = 11,084,787,744.82
  5. Step 5: Solve for x
    x = 11,084,787,744.82/111,554.28
  6. Step 6: Final answer
    x = 99,366.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.