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Finding the Fourth Proportional to 128,393.43, 192,516.03 and 39,623.10

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Solution

The fourth proportional to 128,393.43, 192,516.03 and 39,623.10 is: 59,411.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,393.43 : 192,516.03 = 39,623.10 : x
  2. Step 2: Convert to fraction form
    128,393.43/192,516.03 = 39,623.10/x
  3. Step 3: Cross multiply
    128,393.43x = 192,516.03 × 39,623.10
  4. Step 4: Simplify right side
    128,393.43x = 7,628,081,908.29
  5. Step 5: Solve for x
    x = 7,628,081,908.29/128,393.43
  6. Step 6: Final answer
    x = 59,411.78

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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.