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Finding the Fourth Proportional to 68,821.56, 103,212.51 and 18,903.29

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Solution

The fourth proportional to 68,821.56, 103,212.51 and 18,903.29 is: 28,349.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,821.56 : 103,212.51 = 18,903.29 : x
  2. Step 2: Convert to fraction form
    68,821.56/103,212.51 = 18,903.29/x
  3. Step 3: Cross multiply
    68,821.56x = 103,212.51 × 18,903.29
  4. Step 4: Simplify right side
    68,821.56x = 1,951,056,008.16
  5. Step 5: Solve for x
    x = 1,951,056,008.16/68,821.56
  6. Step 6: Final answer
    x = 28,349.49

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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.