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Finding the Fourth Proportional to 139,529.84, 192,550.20 and 75,867.68

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Solution

The fourth proportional to 139,529.84, 192,550.20 and 75,867.68 is: 104,696.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,529.84 : 192,550.20 = 75,867.68 : x
  2. Step 2: Convert to fraction form
    139,529.84/192,550.20 = 75,867.68/x
  3. Step 3: Cross multiply
    139,529.84x = 192,550.20 × 75,867.68
  4. Step 4: Simplify right side
    139,529.84x = 14,608,336,957.54
  5. Step 5: Solve for x
    x = 14,608,336,957.54/139,529.84
  6. Step 6: Final answer
    x = 104,696.87

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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.