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Finding the Fourth Proportional to 80,546.80, 120,820.20 and 79,963.60

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Solution

The fourth proportional to 80,546.80, 120,820.20 and 79,963.60 is: 119,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,546.80 : 120,820.20 = 79,963.60 : x
  2. Step 2: Convert to fraction form
    80,546.80/120,820.20 = 79,963.60/x
  3. Step 3: Cross multiply
    80,546.80x = 120,820.20 × 79,963.60
  4. Step 4: Simplify right side
    80,546.80x = 9,661,218,144.72
  5. Step 5: Solve for x
    x = 9,661,218,144.72/80,546.80
  6. Step 6: Final answer
    x = 119,945.40

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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.