Finding the Fourth Proportional to 137.75, 206.36 and 69.07
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Solution
The fourth proportional to 137.75, 206.36 and 69.07 is: 103.47
Step by Step Solution
- Step 1: Write the proportion equation
137.75 : 206.36 = 69.07 : x - Step 2: Convert to fraction form
137.75/206.36 = 69.07/x - Step 3: Cross multiply
137.75x = 206.36 × 69.07 - Step 4: Simplify right side
137.75x = 14,252.94 - Step 5: Solve for x
x = 14,252.94/137.75 - Step 6: Final answer
x = 103.47
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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.