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Finding the Fourth Proportional to 68,809.22, 103,212.90 and 18,889.25

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Solution

The fourth proportional to 68,809.22, 103,212.90 and 18,889.25 is: 28,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.22 : 103,212.90 = 18,889.25 : x
  2. Step 2: Convert to fraction form
    68,809.22/103,212.90 = 18,889.25/x
  3. Step 3: Cross multiply
    68,809.22x = 103,212.90 × 18,889.25
  4. Step 4: Simplify right side
    68,809.22x = 1,949,614,529.36
  5. Step 5: Solve for x
    x = 1,949,614,529.36/68,809.22
  6. Step 6: Final answer
    x = 28,333.63

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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.