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Finding the Fourth Proportional to 80,372.56, 120,389.16 and 64,491.52

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Solution

The fourth proportional to 80,372.56, 120,389.16 and 64,491.52 is: 96,601.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,372.56 : 120,389.16 = 64,491.52 : x
  2. Step 2: Convert to fraction form
    80,372.56/120,389.16 = 64,491.52/x
  3. Step 3: Cross multiply
    80,372.56x = 120,389.16 × 64,491.52
  4. Step 4: Simplify right side
    80,372.56x = 7,764,079,919.92
  5. Step 5: Solve for x
    x = 7,764,079,919.92/80,372.56
  6. Step 6: Final answer
    x = 96,601.13

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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.