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Finding the Fourth Proportional to 68,830.84, 103,235.46 and 18,914.68

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Solution

The fourth proportional to 68,830.84, 103,235.46 and 18,914.68 is: 28,369.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,830.84 : 103,235.46 = 18,914.68 : x
  2. Step 2: Convert to fraction form
    68,830.84/103,235.46 = 18,914.68/x
  3. Step 3: Cross multiply
    68,830.84x = 103,235.46 × 18,914.68
  4. Step 4: Simplify right side
    68,830.84x = 1,952,665,690.55
  5. Step 5: Solve for x
    x = 1,952,665,690.55/68,830.84
  6. Step 6: Final answer
    x = 28,369.05

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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.