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Finding the Fourth Proportional to 80,662.60, 120,919.38 and 43,248.70

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Solution

The fourth proportional to 80,662.60, 120,919.38 and 43,248.70 is: 64,833.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,662.60 : 120,919.38 = 43,248.70 : x
  2. Step 2: Convert to fraction form
    80,662.60/120,919.38 = 43,248.70/x
  3. Step 3: Cross multiply
    80,662.60x = 120,919.38 × 43,248.70
  4. Step 4: Simplify right side
    80,662.60x = 5,229,605,989.81
  5. Step 5: Solve for x
    x = 5,229,605,989.81/80,662.60
  6. Step 6: Final answer
    x = 64,833.09

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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.