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Finding the Fourth Proportional to 268,693.86, 403,026.18 and 81,690.78

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Solution

The fourth proportional to 268,693.86, 403,026.18 and 81,690.78 is: 122,531.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,693.86 : 403,026.18 = 81,690.78 : x
  2. Step 2: Convert to fraction form
    268,693.86/403,026.18 = 81,690.78/x
  3. Step 3: Cross multiply
    268,693.86x = 403,026.18 × 81,690.78
  4. Step 4: Simplify right side
    268,693.86x = 32,923,523,004.62
  5. Step 5: Solve for x
    x = 32,923,523,004.62/268,693.86
  6. Step 6: Final answer
    x = 122,531.73

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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.