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Finding the Fourth Proportional to 68,116.50, 94,008.60 and 39,820.50

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Solution

The fourth proportional to 68,116.50, 94,008.60 and 39,820.50 is: 54,956.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,116.50 : 94,008.60 = 39,820.50 : x
  2. Step 2: Convert to fraction form
    68,116.50/94,008.60 = 39,820.50/x
  3. Step 3: Cross multiply
    68,116.50x = 94,008.60 × 39,820.50
  4. Step 4: Simplify right side
    68,116.50x = 3,743,469,456.30
  5. Step 5: Solve for x
    x = 3,743,469,456.30/68,116.50
  6. Step 6: Final answer
    x = 54,956.87

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1.5x scale

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.