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Finding the Fourth Proportional to 68,860.29, 103,290.90 and 18,945.66

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Solution

The fourth proportional to 68,860.29, 103,290.90 and 18,945.66 is: 28,418.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,860.29 : 103,290.90 = 18,945.66 : x
  2. Step 2: Convert to fraction form
    68,860.29/103,290.90 = 18,945.66/x
  3. Step 3: Cross multiply
    68,860.29x = 103,290.90 × 18,945.66
  4. Step 4: Simplify right side
    68,860.29x = 1,956,914,177.77
  5. Step 5: Solve for x
    x = 1,956,914,177.77/68,860.29
  6. Step 6: Final answer
    x = 28,418.62

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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.