Home / 120,115.62-180,138.78-35,872.38

Finding the Fourth Proportional to 120,115.62, 180,138.78 and 35,872.38

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Solution

The fourth proportional to 120,115.62, 180,138.78 and 35,872.38 is: 53,798.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,115.62 : 180,138.78 = 35,872.38 : x
  2. Step 2: Convert to fraction form
    120,115.62/180,138.78 = 35,872.38/x
  3. Step 3: Cross multiply
    120,115.62x = 180,138.78 × 35,872.38
  4. Step 4: Simplify right side
    120,115.62x = 6,462,006,768.90
  5. Step 5: Solve for x
    x = 6,462,006,768.90/120,115.62
  6. Step 6: Final answer
    x = 53,798.22

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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.