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Finding the Fourth Proportional to 80,704.54, 121,076.79 and 28,114.48

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Solution

The fourth proportional to 80,704.54, 121,076.79 and 28,114.48 is: 42,178.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,704.54 : 121,076.79 = 28,114.48 : x
  2. Step 2: Convert to fraction form
    80,704.54/121,076.79 = 28,114.48/x
  3. Step 3: Cross multiply
    80,704.54x = 121,076.79 × 28,114.48
  4. Step 4: Simplify right side
    80,704.54x = 3,404,010,990.92
  5. Step 5: Solve for x
    x = 3,404,010,990.92/80,704.54
  6. Step 6: Final answer
    x = 42,178.68

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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.