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Finding the Fourth Proportional to 168,086.10, 252,129.15 and 79,512.60

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Solution

The fourth proportional to 168,086.10, 252,129.15 and 79,512.60 is: 119,268.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,086.10 : 252,129.15 = 79,512.60 : x
  2. Step 2: Convert to fraction form
    168,086.10/252,129.15 = 79,512.60/x
  3. Step 3: Cross multiply
    168,086.10x = 252,129.15 × 79,512.60
  4. Step 4: Simplify right side
    168,086.10x = 20,047,444,252.29
  5. Step 5: Solve for x
    x = 20,047,444,252.29/168,086.10
  6. Step 6: Final answer
    x = 119,268.90

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1.5x scale

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.