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Finding the Fourth Proportional to 68,640.61, 102,962.72 and 23,661.49

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Solution

The fourth proportional to 68,640.61, 102,962.72 and 23,661.49 is: 35,492.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,640.61 : 102,962.72 = 23,661.49 : x
  2. Step 2: Convert to fraction form
    68,640.61/102,962.72 = 23,661.49/x
  3. Step 3: Cross multiply
    68,640.61x = 102,962.72 × 23,661.49
  4. Step 4: Simplify right side
    68,640.61x = 2,436,251,251.35
  5. Step 5: Solve for x
    x = 2,436,251,251.35/68,640.61
  6. Step 6: Final answer
    x = 35,492.86

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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.