Home / 280,775.12-421,139.01-120,844.60

Finding the Fourth Proportional to 280,775.12, 421,139.01 and 120,844.60

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Solution

The fourth proportional to 280,775.12, 421,139.01 and 120,844.60 is: 181,256.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,775.12 : 421,139.01 = 120,844.60 : x
  2. Step 2: Convert to fraction form
    280,775.12/421,139.01 = 120,844.60/x
  3. Step 3: Cross multiply
    280,775.12x = 421,139.01 × 120,844.60
  4. Step 4: Simplify right side
    280,775.12x = 50,892,375,207.85
  5. Step 5: Solve for x
    x = 50,892,375,207.85/280,775.12
  6. Step 6: Final answer
    x = 181,256.71

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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.