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Finding the Fourth Proportional to 80,616.60, 120,665.70 and 43,082.64

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Solution

The fourth proportional to 80,616.60, 120,665.70 and 43,082.64 is: 64,485.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,616.60 : 120,665.70 = 43,082.64 : x
  2. Step 2: Convert to fraction form
    80,616.60/120,665.70 = 43,082.64/x
  3. Step 3: Cross multiply
    80,616.60x = 120,665.70 × 43,082.64
  4. Step 4: Simplify right side
    80,616.60x = 5,198,596,913.45
  5. Step 5: Solve for x
    x = 5,198,596,913.45/80,616.60
  6. Step 6: Final answer
    x = 64,485.44

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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.