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Finding the Fourth Proportional to 168,268.40, 252,402.60 and 121,029.20

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Solution

The fourth proportional to 168,268.40, 252,402.60 and 121,029.20 is: 181,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,268.40 : 252,402.60 = 121,029.20 : x
  2. Step 2: Convert to fraction form
    168,268.40/252,402.60 = 121,029.20/x
  3. Step 3: Cross multiply
    168,268.40x = 252,402.60 × 121,029.20
  4. Step 4: Simplify right side
    168,268.40x = 30,548,084,755.92
  5. Step 5: Solve for x
    x = 30,548,084,755.92/168,268.40
  6. Step 6: Final answer
    x = 181,543.80

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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.