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Finding the Fourth Proportional to 80,615.60, 120,805.08 and 40,579.60

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Solution

The fourth proportional to 80,615.60, 120,805.08 and 40,579.60 is: 60,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,615.60 : 120,805.08 = 40,579.60 : x
  2. Step 2: Convert to fraction form
    80,615.60/120,805.08 = 40,579.60/x
  3. Step 3: Cross multiply
    80,615.60x = 120,805.08 × 40,579.60
  4. Step 4: Simplify right side
    80,615.60x = 4,902,221,824.37
  5. Step 5: Solve for x
    x = 4,902,221,824.37/80,615.60
  6. Step 6: Final answer
    x = 60,809.84

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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.