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Finding the Fourth Proportional to 80,373.62, 120,551.16 and 21,213.91

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Solution

The fourth proportional to 80,373.62, 120,551.16 and 21,213.91 is: 31,818.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,373.62 : 120,551.16 = 21,213.91 : x
  2. Step 2: Convert to fraction form
    80,373.62/120,551.16 = 21,213.91/x
  3. Step 3: Cross multiply
    80,373.62x = 120,551.16 × 21,213.91
  4. Step 4: Simplify right side
    80,373.62x = 2,557,361,157.26
  5. Step 5: Solve for x
    x = 2,557,361,157.26/80,373.62
  6. Step 6: Final answer
    x = 31,818.41

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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.