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Finding the Fourth Proportional to 68,213.76, 94,135.08 and 39,538.99

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Solution

The fourth proportional to 68,213.76, 94,135.08 and 39,538.99 is: 54,563.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,213.76 : 94,135.08 = 39,538.99 : x
  2. Step 2: Convert to fraction form
    68,213.76/94,135.08 = 39,538.99/x
  3. Step 3: Cross multiply
    68,213.76x = 94,135.08 × 39,538.99
  4. Step 4: Simplify right side
    68,213.76x = 3,722,005,986.77
  5. Step 5: Solve for x
    x = 3,722,005,986.77/68,213.76
  6. Step 6: Final answer
    x = 54,563.86

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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.