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Finding the Fourth Proportional to 128,273.40, 192,413.40 and 60,789.60

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Solution

The fourth proportional to 128,273.40, 192,413.40 and 60,789.60 is: 91,185.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,273.40 : 192,413.40 = 60,789.60 : x
  2. Step 2: Convert to fraction form
    128,273.40/192,413.40 = 60,789.60/x
  3. Step 3: Cross multiply
    128,273.40x = 192,413.40 × 60,789.60
  4. Step 4: Simplify right side
    128,273.40x = 11,696,733,620.64
  5. Step 5: Solve for x
    x = 11,696,733,620.64/128,273.40
  6. Step 6: Final answer
    x = 91,185.96

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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.