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Finding the Fourth Proportional to 68,599.34, 102,905.16 and 18,679.70

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Solution

The fourth proportional to 68,599.34, 102,905.16 and 18,679.70 is: 28,021.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,599.34 : 102,905.16 = 18,679.70 : x
  2. Step 2: Convert to fraction form
    68,599.34/102,905.16 = 18,679.70/x
  3. Step 3: Cross multiply
    68,599.34x = 102,905.16 × 18,679.70
  4. Step 4: Simplify right side
    68,599.34x = 1,922,237,517.25
  5. Step 5: Solve for x
    x = 1,922,237,517.25/68,599.34
  6. Step 6: Final answer
    x = 28,021.22

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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.