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Finding the Fourth Proportional to 68,664.80, 102,920.40 and 39,096.80

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Solution

The fourth proportional to 68,664.80, 102,920.40 and 39,096.80 is: 58,601.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,664.80 : 102,920.40 = 39,096.80 : x
  2. Step 2: Convert to fraction form
    68,664.80/102,920.40 = 39,096.80/x
  3. Step 3: Cross multiply
    68,664.80x = 102,920.40 × 39,096.80
  4. Step 4: Simplify right side
    68,664.80x = 4,023,858,294.72
  5. Step 5: Solve for x
    x = 4,023,858,294.72/68,664.80
  6. Step 6: Final answer
    x = 58,601.47

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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.