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Finding the Fourth Proportional to 230,734.20, 318,413.92 and 128,763.98

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Solution

The fourth proportional to 230,734.20, 318,413.92 and 128,763.98 is: 177,694.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,734.20 : 318,413.92 = 128,763.98 : x
  2. Step 2: Convert to fraction form
    230,734.20/318,413.92 = 128,763.98/x
  3. Step 3: Cross multiply
    230,734.20x = 318,413.92 × 128,763.98
  4. Step 4: Simplify right side
    230,734.20x = 41,000,241,712.62
  5. Step 5: Solve for x
    x = 41,000,241,712.62/230,734.20
  6. Step 6: Final answer
    x = 177,694.69

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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.