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Finding the Fourth Proportional to 111,977.91, 154,529.51 and 61,676.91

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Solution

The fourth proportional to 111,977.91, 154,529.51 and 61,676.91 is: 85,114.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,977.91 : 154,529.51 = 61,676.91 : x
  2. Step 2: Convert to fraction form
    111,977.91/154,529.51 = 61,676.91/x
  3. Step 3: Cross multiply
    111,977.91x = 154,529.51 × 61,676.91
  4. Step 4: Simplify right side
    111,977.91x = 9,530,902,680.61
  5. Step 5: Solve for x
    x = 9,530,902,680.61/111,977.91
  6. Step 6: Final answer
    x = 85,114.13

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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.