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Finding the Fourth Proportional to 248,917.20, 372,922.20 and 143,422.80

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Solution

The fourth proportional to 248,917.20, 372,922.20 and 143,422.80 is: 214,872.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,917.20 : 372,922.20 = 143,422.80 : x
  2. Step 2: Convert to fraction form
    248,917.20/372,922.20 = 143,422.80/x
  3. Step 3: Cross multiply
    248,917.20x = 372,922.20 × 143,422.80
  4. Step 4: Simplify right side
    248,917.20x = 53,485,546,106.16
  5. Step 5: Solve for x
    x = 53,485,546,106.16/248,917.20
  6. Step 6: Final answer
    x = 214,872.84

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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.