Finding the Fourth Proportional to 137.57, 206.28 and 68.99
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Solution
The fourth proportional to 137.57, 206.28 and 68.99 is: 103.44
Step by Step Solution
- Step 1: Write the proportion equation
137.57 : 206.28 = 68.99 : x - Step 2: Convert to fraction form
137.57/206.28 = 68.99/x - Step 3: Cross multiply
137.57x = 206.28 × 68.99 - Step 4: Simplify right side
137.57x = 14,230.23 - Step 5: Solve for x
x = 14,230.23/137.57 - Step 6: Final answer
x = 103.44
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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.