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Finding the Fourth Proportional to 128,716.96, 193,147.94 and 100,558.08

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Solution

The fourth proportional to 128,716.96, 193,147.94 and 100,558.08 is: 150,893.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,716.96 : 193,147.94 = 100,558.08 : x
  2. Step 2: Convert to fraction form
    128,716.96/193,147.94 = 100,558.08/x
  3. Step 3: Cross multiply
    128,716.96x = 193,147.94 × 100,558.08
  4. Step 4: Simplify right side
    128,716.96x = 19,422,586,002.36
  5. Step 5: Solve for x
    x = 19,422,586,002.36/128,716.96
  6. Step 6: Final answer
    x = 150,893.76

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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.