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Finding the Fourth Proportional to 128,600.68, 192,830.54 and 39,829.54

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Solution

The fourth proportional to 128,600.68, 192,830.54 and 39,829.54 is: 59,722.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.68 : 192,830.54 = 39,829.54 : x
  2. Step 2: Convert to fraction form
    128,600.68/192,830.54 = 39,829.54/x
  3. Step 3: Cross multiply
    128,600.68x = 192,830.54 × 39,829.54
  4. Step 4: Simplify right side
    128,600.68x = 7,680,351,706.15
  5. Step 5: Solve for x
    x = 7,680,351,706.15/128,600.68
  6. Step 6: Final answer
    x = 59,722.48

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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.