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Finding the Fourth Proportional to 128,556.78, 192,815.37 and 35,069.82

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Solution

The fourth proportional to 128,556.78, 192,815.37 and 35,069.82 is: 52,599.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,556.78 : 192,815.37 = 35,069.82 : x
  2. Step 2: Convert to fraction form
    128,556.78/192,815.37 = 35,069.82/x
  3. Step 3: Cross multiply
    128,556.78x = 192,815.37 × 35,069.82
  4. Step 4: Simplify right side
    128,556.78x = 6,762,000,319.13
  5. Step 5: Solve for x
    x = 6,762,000,319.13/128,556.78
  6. Step 6: Final answer
    x = 52,599.33

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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.