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Finding the Fourth Proportional to 68,283.84, 94,233.60 and 39,990.72

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Solution

The fourth proportional to 68,283.84, 94,233.60 and 39,990.72 is: 55,188.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,283.84 : 94,233.60 = 39,990.72 : x
  2. Step 2: Convert to fraction form
    68,283.84/94,233.60 = 39,990.72/x
  3. Step 3: Cross multiply
    68,283.84x = 94,233.60 × 39,990.72
  4. Step 4: Simplify right side
    68,283.84x = 3,768,469,512.19
  5. Step 5: Solve for x
    x = 3,768,469,512.19/68,283.84
  6. Step 6: Final answer
    x = 55,188.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.