Finding the Fourth Proportional to 129.09, 193.36 and 92.91
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Solution
The fourth proportional to 129.09, 193.36 and 92.91 is: 139.17
Step by Step Solution
- Step 1: Write the proportion equation
129.09 : 193.36 = 92.91 : x - Step 2: Convert to fraction form
129.09/193.36 = 92.91/x - Step 3: Cross multiply
129.09x = 193.36 × 92.91 - Step 4: Simplify right side
129.09x = 17,965.08 - Step 5: Solve for x
x = 17,965.08/129.09 - Step 6: Final answer
x = 139.17
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.