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Finding the Fourth Proportional to 128,993.91, 193,491.95 and 35,504.79

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Solution

The fourth proportional to 128,993.91, 193,491.95 and 35,504.79 is: 53,257.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,993.91 : 193,491.95 = 35,504.79 : x
  2. Step 2: Convert to fraction form
    128,993.91/193,491.95 = 35,504.79/x
  3. Step 3: Cross multiply
    128,993.91x = 193,491.95 × 35,504.79
  4. Step 4: Simplify right side
    128,993.91x = 6,869,890,873.92
  5. Step 5: Solve for x
    x = 6,869,890,873.92/128,993.91
  6. Step 6: Final answer
    x = 53,257.48

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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.