Finding the Fourth Proportional to 140.09, 193.29 and 81.08
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Solution
The fourth proportional to 140.09, 193.29 and 81.08 is: 111.87
Step by Step Solution
- Step 1: Write the proportion equation
140.09 : 193.29 = 81.08 : x - Step 2: Convert to fraction form
140.09/193.29 = 81.08/x - Step 3: Cross multiply
140.09x = 193.29 × 81.08 - Step 4: Simplify right side
140.09x = 15,670.99 - Step 5: Solve for x
x = 15,670.99/140.09 - Step 6: Final answer
x = 111.87
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.