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Finding the Fourth Proportional to 80,796.80, 121,292.40 and 80,213.60

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Solution

The fourth proportional to 80,796.80, 121,292.40 and 80,213.60 is: 120,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,796.80 : 121,292.40 = 80,213.60 : x
  2. Step 2: Convert to fraction form
    80,796.80/121,292.40 = 80,213.60/x
  3. Step 3: Cross multiply
    80,796.80x = 121,292.40 × 80,213.60
  4. Step 4: Simplify right side
    80,796.80x = 9,729,300,056.64
  5. Step 5: Solve for x
    x = 9,729,300,056.64/80,796.80
  6. Step 6: Final answer
    x = 120,416.90

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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.