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Finding the Fourth Proportional to 68,782.38, 103,173.72 and 18,863.19

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Solution

The fourth proportional to 68,782.38, 103,173.72 and 18,863.19 is: 28,294.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,782.38 : 103,173.72 = 18,863.19 : x
  2. Step 2: Convert to fraction form
    68,782.38/103,173.72 = 18,863.19/x
  3. Step 3: Cross multiply
    68,782.38x = 103,173.72 × 18,863.19
  4. Step 4: Simplify right side
    68,782.38x = 1,946,185,412.63
  5. Step 5: Solve for x
    x = 1,946,185,412.63/68,782.38
  6. Step 6: Final answer
    x = 28,294.83

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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.