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Finding the Fourth Proportional to 128,716.94, 193,142.71 and 93,469.39

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Solution

The fourth proportional to 128,716.94, 193,142.71 and 93,469.39 is: 140,252.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,716.94 : 193,142.71 = 93,469.39 : x
  2. Step 2: Convert to fraction form
    128,716.94/193,142.71 = 93,469.39/x
  3. Step 3: Cross multiply
    128,716.94x = 193,142.71 × 93,469.39
  4. Step 4: Simplify right side
    128,716.94x = 18,052,931,286.65
  5. Step 5: Solve for x
    x = 18,052,931,286.65/128,716.94
  6. Step 6: Final answer
    x = 140,252.96

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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.