Finding the Fourth Proportional to 136.99, 205.49 and 68.55
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Solution
The fourth proportional to 136.99, 205.49 and 68.55 is: 102.82
Step by Step Solution
- Step 1: Write the proportion equation
136.99 : 205.49 = 68.55 : x - Step 2: Convert to fraction form
136.99/205.49 = 68.55/x - Step 3: Cross multiply
136.99x = 205.49 × 68.55 - Step 4: Simplify right side
136.99x = 14,085.35 - Step 5: Solve for x
x = 14,085.35/136.99 - Step 6: Final answer
x = 102.82
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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.