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Finding the Fourth Proportional to 68,877.78, 103,218.09 and 39,234.39

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Solution

The fourth proportional to 68,877.78, 103,218.09 and 39,234.39 is: 58,795.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,877.78 : 103,218.09 = 39,234.39 : x
  2. Step 2: Convert to fraction form
    68,877.78/103,218.09 = 39,234.39/x
  3. Step 3: Cross multiply
    68,877.78x = 103,218.09 × 39,234.39
  4. Step 4: Simplify right side
    68,877.78x = 4,049,698,798.12
  5. Step 5: Solve for x
    x = 4,049,698,798.12/68,877.78
  6. Step 6: Final answer
    x = 58,795.43

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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.