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Finding the Fourth Proportional to 80,868.96, 121,296.96 and 21,704.40

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Solution

The fourth proportional to 80,868.96, 121,296.96 and 21,704.40 is: 32,554.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,868.96 : 121,296.96 = 21,704.40 : x
  2. Step 2: Convert to fraction form
    80,868.96/121,296.96 = 21,704.40/x
  3. Step 3: Cross multiply
    80,868.96x = 121,296.96 × 21,704.40
  4. Step 4: Simplify right side
    80,868.96x = 2,632,677,738.62
  5. Step 5: Solve for x
    x = 2,632,677,738.62/80,868.96
  6. Step 6: Final answer
    x = 32,554.86

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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.