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Finding the Fourth Proportional to 291,262.80, 436,872.60 and 122,739.60

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Solution

The fourth proportional to 291,262.80, 436,872.60 and 122,739.60 is: 184,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,262.80 : 436,872.60 = 122,739.60 : x
  2. Step 2: Convert to fraction form
    291,262.80/436,872.60 = 122,739.60/x
  3. Step 3: Cross multiply
    291,262.80x = 436,872.60 × 122,739.60
  4. Step 4: Simplify right side
    291,262.80x = 53,621,568,174.96
  5. Step 5: Solve for x
    x = 53,621,568,174.96/291,262.80
  6. Step 6: Final answer
    x = 184,100.30

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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.