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Finding the Fourth Proportional to 136,344.81, 188,163.59 and 81,913.63

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Solution

The fourth proportional to 136,344.81, 188,163.59 and 81,913.63 is: 113,045.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,344.81 : 188,163.59 = 81,913.63 : x
  2. Step 2: Convert to fraction form
    136,344.81/188,163.59 = 81,913.63/x
  3. Step 3: Cross multiply
    136,344.81x = 188,163.59 × 81,913.63
  4. Step 4: Simplify right side
    136,344.81x = 15,413,162,690.73
  5. Step 5: Solve for x
    x = 15,413,162,690.73/136,344.81
  6. Step 6: Final answer
    x = 113,045.47

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1.5x scale

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.