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Finding the Fourth Proportional to 80,072.36, 120,025.04 and 30,118.04

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Solution

The fourth proportional to 80,072.36, 120,025.04 and 30,118.04 is: 45,145.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,072.36 : 120,025.04 = 30,118.04 : x
  2. Step 2: Convert to fraction form
    80,072.36/120,025.04 = 30,118.04/x
  3. Step 3: Cross multiply
    80,072.36x = 120,025.04 × 30,118.04
  4. Step 4: Simplify right side
    80,072.36x = 3,614,918,955.72
  5. Step 5: Solve for x
    x = 3,614,918,955.72/80,072.36
  6. Step 6: Final answer
    x = 45,145.65

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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.