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Finding the Fourth Proportional to 128,324.57, 192,357.70 and 53,486.15

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Solution

The fourth proportional to 128,324.57, 192,357.70 and 53,486.15 is: 80,175.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,324.57 : 192,357.70 = 53,486.15 : x
  2. Step 2: Convert to fraction form
    128,324.57/192,357.70 = 53,486.15/x
  3. Step 3: Cross multiply
    128,324.57x = 192,357.70 × 53,486.15
  4. Step 4: Simplify right side
    128,324.57x = 10,288,473,143.03
  5. Step 5: Solve for x
    x = 10,288,473,143.03/128,324.57
  6. Step 6: Final answer
    x = 80,175.39

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.