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Finding the Fourth Proportional to 136,576.40, 204,913.20 and 131,716.40

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Solution

The fourth proportional to 136,576.40, 204,913.20 and 131,716.40 is: 197,621.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,576.40 : 204,913.20 = 131,716.40 : x
  2. Step 2: Convert to fraction form
    136,576.40/204,913.20 = 131,716.40/x
  3. Step 3: Cross multiply
    136,576.40x = 204,913.20 × 131,716.40
  4. Step 4: Simplify right side
    136,576.40x = 26,990,429,016.48
  5. Step 5: Solve for x
    x = 26,990,429,016.48/136,576.40
  6. Step 6: Final answer
    x = 197,621.47

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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.