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Finding the Fourth Proportional to 80,351, 120,369.60 and 38,171.04

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Solution

The fourth proportional to 80,351, 120,369.60 and 38,171.04 is: 57,182.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,351 : 120,369.60 = 38,171.04 : x
  2. Step 2: Convert to fraction form
    80,351/120,369.60 = 38,171.04/x
  3. Step 3: Cross multiply
    80,351x = 120,369.60 × 38,171.04
  4. Step 4: Simplify right side
    80,351x = 4,594,632,816.38
  5. Step 5: Solve for x
    x = 4,594,632,816.38/80,351
  6. Step 6: Final answer
    x = 57,182.02

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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.