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Finding the Fourth Proportional to 128,924.87, 193,426.89 and 61,542.88

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Solution

The fourth proportional to 128,924.87, 193,426.89 and 61,542.88 is: 92,333.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,924.87 : 193,426.89 = 61,542.88 : x
  2. Step 2: Convert to fraction form
    128,924.87/193,426.89 = 61,542.88/x
  3. Step 3: Cross multiply
    128,924.87x = 193,426.89 × 61,542.88
  4. Step 4: Simplify right side
    128,924.87x = 11,904,048,785.36
  5. Step 5: Solve for x
    x = 11,904,048,785.36/128,924.87
  6. Step 6: Final answer
    x = 92,333.23

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1.5x scale

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.