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Finding the Fourth Proportional to 107,121.20, 160,854.60 and 80,855.60

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Solution

The fourth proportional to 107,121.20, 160,854.60 and 80,855.60 is: 121,413.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,121.20 : 160,854.60 = 80,855.60 : x
  2. Step 2: Convert to fraction form
    107,121.20/160,854.60 = 80,855.60/x
  3. Step 3: Cross multiply
    107,121.20x = 160,854.60 × 80,855.60
  4. Step 4: Simplify right side
    107,121.20x = 13,005,995,195.76
  5. Step 5: Solve for x
    x = 13,005,995,195.76/107,121.20
  6. Step 6: Final answer
    x = 121,413.83

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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.