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Finding the Fourth Proportional to 111,991.88, 154,546.64 and 61,004.01

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Solution

The fourth proportional to 111,991.88, 154,546.64 and 61,004.01 is: 84,184.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,991.88 : 154,546.64 = 61,004.01 : x
  2. Step 2: Convert to fraction form
    111,991.88/154,546.64 = 61,004.01/x
  3. Step 3: Cross multiply
    111,991.88x = 154,546.64 × 61,004.01
  4. Step 4: Simplify right side
    111,991.88x = 9,427,964,467.01
  5. Step 5: Solve for x
    x = 9,427,964,467.01/111,991.88
  6. Step 6: Final answer
    x = 84,184.36

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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.