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Finding the Fourth Proportional to 80,605.60, 120,865.20 and 33,805.60

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Solution

The fourth proportional to 80,605.60, 120,865.20 and 33,805.60 is: 50,690.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,605.60 : 120,865.20 = 33,805.60 : x
  2. Step 2: Convert to fraction form
    80,605.60/120,865.20 = 33,805.60/x
  3. Step 3: Cross multiply
    80,605.60x = 120,865.20 × 33,805.60
  4. Step 4: Simplify right side
    80,605.60x = 4,085,920,605.12
  5. Step 5: Solve for x
    x = 4,085,920,605.12/80,605.60
  6. Step 6: Final answer
    x = 50,690.28

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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.