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Finding the Fourth Proportional to 128,759.07, 193,224.32 and 52,919.81

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Solution

The fourth proportional to 128,759.07, 193,224.32 and 52,919.81 is: 79,414.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,759.07 : 193,224.32 = 52,919.81 : x
  2. Step 2: Convert to fraction form
    128,759.07/193,224.32 = 52,919.81/x
  3. Step 3: Cross multiply
    128,759.07x = 193,224.32 × 52,919.81
  4. Step 4: Simplify right side
    128,759.07x = 10,225,394,301.78
  5. Step 5: Solve for x
    x = 10,225,394,301.78/128,759.07
  6. Step 6: Final answer
    x = 79,414.94

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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.