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Finding the Fourth Proportional to 111,910.70, 154,443.76 and 61,609.70

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Solution

The fourth proportional to 111,910.70, 154,443.76 and 61,609.70 is: 85,025.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,910.70 : 154,443.76 = 61,609.70 : x
  2. Step 2: Convert to fraction form
    111,910.70/154,443.76 = 61,609.70/x
  3. Step 3: Cross multiply
    111,910.70x = 154,443.76 × 61,609.70
  4. Step 4: Simplify right side
    111,910.70x = 9,515,233,720.47
  5. Step 5: Solve for x
    x = 9,515,233,720.47/111,910.70
  6. Step 6: Final answer
    x = 85,025.24

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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.