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Finding the Fourth Proportional to 111,953.43, 154,488.69 and 61,652.43

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Solution

The fourth proportional to 111,953.43, 154,488.69 and 61,652.43 is: 85,076.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,953.43 : 154,488.69 = 61,652.43 : x
  2. Step 2: Convert to fraction form
    111,953.43/154,488.69 = 61,652.43/x
  3. Step 3: Cross multiply
    111,953.43x = 154,488.69 × 61,652.43
  4. Step 4: Simplify right side
    111,953.43x = 9,524,603,146.02
  5. Step 5: Solve for x
    x = 9,524,603,146.02/111,953.43
  6. Step 6: Final answer
    x = 85,076.47

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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.