Finding the Fourth Proportional to 68,758.09, 103,137.21 and 18,838.60
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Solution
The fourth proportional to 68,758.09, 103,137.21 and 18,838.60 is: 28,257.92
Step by Step Solution
- Step 1: Write the proportion equation
68,758.09 : 103,137.21 = 18,838.60 : x - Step 2: Convert to fraction form
68,758.09/103,137.21 = 18,838.60/x - Step 3: Cross multiply
68,758.09x = 103,137.21 × 18,838.60 - Step 4: Simplify right side
68,758.09x = 1,942,960,644.31 - Step 5: Solve for x
x = 1,942,960,644.31/68,758.09 - Step 6: Final answer
x = 28,257.92
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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.