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Finding the Fourth Proportional to 230,379.72, 317,912.61 and 128,413.57

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Solution

The fourth proportional to 230,379.72, 317,912.61 and 128,413.57 is: 177,204.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,379.72 : 317,912.61 = 128,413.57 : x
  2. Step 2: Convert to fraction form
    230,379.72/317,912.61 = 128,413.57/x
  3. Step 3: Cross multiply
    230,379.72x = 317,912.61 × 128,413.57
  4. Step 4: Simplify right side
    230,379.72x = 40,824,293,198.12
  5. Step 5: Solve for x
    x = 40,824,293,198.12/230,379.72
  6. Step 6: Final answer
    x = 177,204.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.