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Finding the Fourth Proportional to 139,616.28, 192,664.80 and 75,954.33

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Solution

The fourth proportional to 139,616.28, 192,664.80 and 75,954.33 is: 104,813.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,616.28 : 192,664.80 = 75,954.33 : x
  2. Step 2: Convert to fraction form
    139,616.28/192,664.80 = 75,954.33/x
  3. Step 3: Cross multiply
    139,616.28x = 192,664.80 × 75,954.33
  4. Step 4: Simplify right side
    139,616.28x = 14,633,725,798.58
  5. Step 5: Solve for x
    x = 14,633,725,798.58/139,616.28
  6. Step 6: Final answer
    x = 104,813.89

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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.