Home / 280,936.78-421,405.53-114,724.78

Finding the Fourth Proportional to 280,936.78, 421,405.53 and 114,724.78

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Solution

The fourth proportional to 280,936.78, 421,405.53 and 114,724.78 is: 172,087.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,936.78 : 421,405.53 = 114,724.78 : x
  2. Step 2: Convert to fraction form
    280,936.78/421,405.53 = 114,724.78/x
  3. Step 3: Cross multiply
    280,936.78x = 421,405.53 × 114,724.78
  4. Step 4: Simplify right side
    280,936.78x = 48,345,656,720.03
  5. Step 5: Solve for x
    x = 48,345,656,720.03/280,936.78
  6. Step 6: Final answer
    x = 172,087.32

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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.