Finding the Fourth Proportional to 137.18, 205.66 and 68.75
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Solution
The fourth proportional to 137.18, 205.66 and 68.75 is: 103.07
Step by Step Solution
- Step 1: Write the proportion equation
137.18 : 205.66 = 68.75 : x - Step 2: Convert to fraction form
137.18/205.66 = 68.75/x - Step 3: Cross multiply
137.18x = 205.66 × 68.75 - Step 4: Simplify right side
137.18x = 14,138.95 - Step 5: Solve for x
x = 14,138.95/137.18 - Step 6: Final answer
x = 103.07
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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.