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Finding the Fourth Proportional to 268,712.78, 403,138.89 and 79,179.85

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Solution

The fourth proportional to 268,712.78, 403,138.89 and 79,179.85 is: 118,790.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,712.78 : 403,138.89 = 79,179.85 : x
  2. Step 2: Convert to fraction form
    268,712.78/403,138.89 = 79,179.85/x
  3. Step 3: Cross multiply
    268,712.78x = 403,138.89 × 79,179.85
  4. Step 4: Simplify right side
    268,712.78x = 31,920,476,839.37
  5. Step 5: Solve for x
    x = 31,920,476,839.37/268,712.78
  6. Step 6: Final answer
    x = 118,790.32

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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.