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Finding the Fourth Proportional to 210,201.78, 315,413.39 and 121,517.57

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Solution

The fourth proportional to 210,201.78, 315,413.39 and 121,517.57 is: 182,340.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,201.78 : 315,413.39 = 121,517.57 : x
  2. Step 2: Convert to fraction form
    210,201.78/315,413.39 = 121,517.57/x
  3. Step 3: Cross multiply
    210,201.78x = 315,413.39 × 121,517.57
  4. Step 4: Simplify right side
    210,201.78x = 38,328,268,016.39
  5. Step 5: Solve for x
    x = 38,328,268,016.39/210,201.78
  6. Step 6: Final answer
    x = 182,340.36

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1.5x scale

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.