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Finding the Fourth Proportional to 171,454.78, 257,057.55 and 71,643.54

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Solution

The fourth proportional to 171,454.78, 257,057.55 and 71,643.54 is: 107,413.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,454.78 : 257,057.55 = 71,643.54 : x
  2. Step 2: Convert to fraction form
    171,454.78/257,057.55 = 71,643.54/x
  3. Step 3: Cross multiply
    171,454.78x = 257,057.55 × 71,643.54
  4. Step 4: Simplify right side
    171,454.78x = 18,416,512,865.73
  5. Step 5: Solve for x
    x = 18,416,512,865.73/171,454.78
  6. Step 6: Final answer
    x = 107,413.24

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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.