Home / 280,775.25-421,139.20-120,844.72

Finding the Fourth Proportional to 280,775.25, 421,139.20 and 120,844.72

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Solution

The fourth proportional to 280,775.25, 421,139.20 and 120,844.72 is: 181,256.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,775.25 : 421,139.20 = 120,844.72 : x
  2. Step 2: Convert to fraction form
    280,775.25/421,139.20 = 120,844.72/x
  3. Step 3: Cross multiply
    280,775.25x = 421,139.20 × 120,844.72
  4. Step 4: Simplify right side
    280,775.25x = 50,892,448,705.02
  5. Step 5: Solve for x
    x = 50,892,448,705.02/280,775.25
  6. Step 6: Final answer
    x = 181,256.89

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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.