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Finding the Fourth Proportional to 68,739.92, 103,122.84 and 21,980.24

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Solution

The fourth proportional to 68,739.92, 103,122.84 and 21,980.24 is: 32,974.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,739.92 : 103,122.84 = 21,980.24 : x
  2. Step 2: Convert to fraction form
    68,739.92/103,122.84 = 21,980.24/x
  3. Step 3: Cross multiply
    68,739.92x = 103,122.84 × 21,980.24
  4. Step 4: Simplify right side
    68,739.92x = 2,266,664,772.68
  5. Step 5: Solve for x
    x = 2,266,664,772.68/68,739.92
  6. Step 6: Final answer
    x = 32,974.50

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1.5x scale

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.