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Finding the Fourth Proportional to 68,951.70, 103,415.22 and 18,351

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Solution

The fourth proportional to 68,951.70, 103,415.22 and 18,351 is: 27,523.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,951.70 : 103,415.22 = 18,351 : x
  2. Step 2: Convert to fraction form
    68,951.70/103,415.22 = 18,351/x
  3. Step 3: Cross multiply
    68,951.70x = 103,415.22 × 18,351
  4. Step 4: Simplify right side
    68,951.70x = 1,897,772,702.22
  5. Step 5: Solve for x
    x = 1,897,772,702.22/68,951.70
  6. Step 6: Final answer
    x = 27,523.22

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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.