Finding the Fourth Proportional to 129.76, 194.74 and 83.99
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Solution
The fourth proportional to 129.76, 194.74 and 83.99 is: 126.05
Step by Step Solution
- Step 1: Write the proportion equation
129.76 : 194.74 = 83.99 : x - Step 2: Convert to fraction form
129.76/194.74 = 83.99/x - Step 3: Cross multiply
129.76x = 194.74 × 83.99 - Step 4: Simplify right side
129.76x = 16,356.49 - Step 5: Solve for x
x = 16,356.49/129.76 - Step 6: Final answer
x = 126.05
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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.