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Finding the Fourth Proportional to 68,949.89, 103,412.49 and 18,349.19

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Solution

The fourth proportional to 68,949.89, 103,412.49 and 18,349.19 is: 27,520.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,949.89 : 103,412.49 = 18,349.19 : x
  2. Step 2: Convert to fraction form
    68,949.89/103,412.49 = 18,349.19/x
  3. Step 3: Cross multiply
    68,949.89x = 103,412.49 × 18,349.19
  4. Step 4: Simplify right side
    68,949.89x = 1,897,535,427.38
  5. Step 5: Solve for x
    x = 1,897,535,427.38/68,949.89
  6. Step 6: Final answer
    x = 27,520.50

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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.