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Finding the Fourth Proportional to 80,123.94, 120,192.74 and 20,959.52

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Solution

The fourth proportional to 80,123.94, 120,192.74 and 20,959.52 is: 31,441.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,123.94 : 120,192.74 = 20,959.52 : x
  2. Step 2: Convert to fraction form
    80,123.94/120,192.74 = 20,959.52/x
  3. Step 3: Cross multiply
    80,123.94x = 120,192.74 × 20,959.52
  4. Step 4: Simplify right side
    80,123.94x = 2,519,181,432.12
  5. Step 5: Solve for x
    x = 2,519,181,432.12/80,123.94
  6. Step 6: Final answer
    x = 31,441.06

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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.