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Finding the Fourth Proportional to 111,556.28, 166,916.16 and 66,412.51

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Solution

The fourth proportional to 111,556.28, 166,916.16 and 66,412.51 is: 99,369.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,556.28 : 166,916.16 = 66,412.51 : x
  2. Step 2: Convert to fraction form
    111,556.28/166,916.16 = 66,412.51/x
  3. Step 3: Cross multiply
    111,556.28x = 166,916.16 × 66,412.51
  4. Step 4: Simplify right side
    111,556.28x = 11,085,321,145.16
  5. Step 5: Solve for x
    x = 11,085,321,145.16/111,556.28
  6. Step 6: Final answer
    x = 99,369.76

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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.