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Finding the Fourth Proportional to 168,018.64, 251,934.80 and 66,713.96

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Solution

The fourth proportional to 168,018.64, 251,934.80 and 66,713.96 is: 100,033.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,018.64 : 251,934.80 = 66,713.96 : x
  2. Step 2: Convert to fraction form
    168,018.64/251,934.80 = 66,713.96/x
  3. Step 3: Cross multiply
    168,018.64x = 251,934.80 × 66,713.96
  4. Step 4: Simplify right side
    168,018.64x = 16,807,568,169.81
  5. Step 5: Solve for x
    x = 16,807,568,169.81/168,018.64
  6. Step 6: Final answer
    x = 100,033.95

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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.