Finding the Fourth Proportional to 129.66, 194.19 and 68.64
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Solution
The fourth proportional to 129.66, 194.19 and 68.64 is: 102.80
Step by Step Solution
- Step 1: Write the proportion equation
129.66 : 194.19 = 68.64 : x - Step 2: Convert to fraction form
129.66/194.19 = 68.64/x - Step 3: Cross multiply
129.66x = 194.19 × 68.64 - Step 4: Simplify right side
129.66x = 13,329.20 - Step 5: Solve for x
x = 13,329.20/129.66 - Step 6: Final answer
x = 102.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.