Finding the Fourth Proportional to 140.21, 193.49 and 81.99
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Solution
The fourth proportional to 140.21, 193.49 and 81.99 is: 113.15
Step by Step Solution
- Step 1: Write the proportion equation
140.21 : 193.49 = 81.99 : x - Step 2: Convert to fraction form
140.21/193.49 = 81.99/x - Step 3: Cross multiply
140.21x = 193.49 × 81.99 - Step 4: Simplify right side
140.21x = 15,864.14 - Step 5: Solve for x
x = 15,864.14/140.21 - Step 6: Final answer
x = 113.15
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.