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Finding the Fourth Proportional to 280,661.60, 421,134.60 and 122,891.60

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Solution

The fourth proportional to 280,661.60, 421,134.60 and 122,891.60 is: 184,399.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,661.60 : 421,134.60 = 122,891.60 : x
  2. Step 2: Convert to fraction form
    280,661.60/421,134.60 = 122,891.60/x
  3. Step 3: Cross multiply
    280,661.60x = 421,134.60 × 122,891.60
  4. Step 4: Simplify right side
    280,661.60x = 51,753,904,809.36
  5. Step 5: Solve for x
    x = 51,753,904,809.36/280,661.60
  6. Step 6: Final answer
    x = 184,399.66

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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.