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Finding the Fourth Proportional to 80,548.29, 120,813.09 and 21,388.59

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Solution

The fourth proportional to 80,548.29, 120,813.09 and 21,388.59 is: 32,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,548.29 : 120,813.09 = 21,388.59 : x
  2. Step 2: Convert to fraction form
    80,548.29/120,813.09 = 21,388.59/x
  3. Step 3: Cross multiply
    80,548.29x = 120,813.09 × 21,388.59
  4. Step 4: Simplify right side
    80,548.29x = 2,584,021,568.44
  5. Step 5: Solve for x
    x = 2,584,021,568.44/80,548.29
  6. Step 6: Final answer
    x = 32,080.40

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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.