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Finding the Fourth Proportional to 168,739.20, 252,817.20 and 142,495.20

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Solution

The fourth proportional to 168,739.20, 252,817.20 and 142,495.20 is: 213,496.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,739.20 : 252,817.20 = 142,495.20 : x
  2. Step 2: Convert to fraction form
    168,739.20/252,817.20 = 142,495.20/x
  3. Step 3: Cross multiply
    168,739.20x = 252,817.20 × 142,495.20
  4. Step 4: Simplify right side
    168,739.20x = 36,025,237,477.44
  5. Step 5: Solve for x
    x = 36,025,237,477.44/168,739.20
  6. Step 6: Final answer
    x = 213,496.55

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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.