Finding the Fourth Proportional to 129.80, 194.94 and 113.74
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Solution
The fourth proportional to 129.80, 194.94 and 113.74 is: 170.81
Step by Step Solution
- Step 1: Write the proportion equation
129.80 : 194.94 = 113.74 : x - Step 2: Convert to fraction form
129.80/194.94 = 113.74/x - Step 3: Cross multiply
129.80x = 194.94 × 113.74 - Step 4: Simplify right side
129.80x = 22,171.99 - Step 5: Solve for x
x = 22,171.99/129.80 - Step 6: Final answer
x = 170.81
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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.