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Finding the Fourth Proportional to 80,642.79, 120,984.03 and 28,052.73

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Solution

The fourth proportional to 80,642.79, 120,984.03 and 28,052.73 is: 42,086.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,642.79 : 120,984.03 = 28,052.73 : x
  2. Step 2: Convert to fraction form
    80,642.79/120,984.03 = 28,052.73/x
  3. Step 3: Cross multiply
    80,642.79x = 120,984.03 × 28,052.73
  4. Step 4: Simplify right side
    80,642.79x = 3,393,932,327.90
  5. Step 5: Solve for x
    x = 3,393,932,327.90/80,642.79
  6. Step 6: Final answer
    x = 42,086.00

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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.