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Finding the Fourth Proportional to 80,998.40, 121,497.60 and 28,413.20

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Solution

The fourth proportional to 80,998.40, 121,497.60 and 28,413.20 is: 42,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.40 : 121,497.60 = 28,413.20 : x
  2. Step 2: Convert to fraction form
    80,998.40/121,497.60 = 28,413.20/x
  3. Step 3: Cross multiply
    80,998.40x = 121,497.60 × 28,413.20
  4. Step 4: Simplify right side
    80,998.40x = 3,452,135,608.32
  5. Step 5: Solve for x
    x = 3,452,135,608.32/80,998.40
  6. Step 6: Final answer
    x = 42,619.80

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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.