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Finding the Fourth Proportional to 80,607.44, 120,911 and 21,443.18

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Solution

The fourth proportional to 80,607.44, 120,911 and 21,443.18 is: 32,164.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,607.44 : 120,911 = 21,443.18 : x
  2. Step 2: Convert to fraction form
    80,607.44/120,911 = 21,443.18/x
  3. Step 3: Cross multiply
    80,607.44x = 120,911 × 21,443.18
  4. Step 4: Simplify right side
    80,607.44x = 2,592,716,336.98
  5. Step 5: Solve for x
    x = 2,592,716,336.98/80,607.44
  6. Step 6: Final answer
    x = 32,164.73

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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.