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Finding the Fourth Proportional to 80,794.80, 121,289.40 and 80,211.60

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Solution

The fourth proportional to 80,794.80, 121,289.40 and 80,211.60 is: 120,413.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,794.80 : 121,289.40 = 80,211.60 : x
  2. Step 2: Convert to fraction form
    80,794.80/121,289.40 = 80,211.60/x
  3. Step 3: Cross multiply
    80,794.80x = 121,289.40 × 80,211.60
  4. Step 4: Simplify right side
    80,794.80x = 9,728,816,837.04
  5. Step 5: Solve for x
    x = 9,728,816,837.04/80,794.80
  6. Step 6: Final answer
    x = 120,413.90

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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.