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Finding the Fourth Proportional to 268,779, 403,226.82 and 81,785.64

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Solution

The fourth proportional to 268,779, 403,226.82 and 81,785.64 is: 122,696.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,779 : 403,226.82 = 81,785.64 : x
  2. Step 2: Convert to fraction form
    268,779/403,226.82 = 81,785.64/x
  3. Step 3: Cross multiply
    268,779x = 403,226.82 × 81,785.64
  4. Step 4: Simplify right side
    268,779x = 32,978,163,538.86
  5. Step 5: Solve for x
    x = 32,978,163,538.86/268,779
  6. Step 6: Final answer
    x = 122,696.21

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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.