Finding the Fourth Proportional to 129.41, 193.96 and 115.74
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Solution
The fourth proportional to 129.41, 193.96 and 115.74 is: 173.48
Step by Step Solution
- Step 1: Write the proportion equation
129.41 : 193.96 = 115.74 : x - Step 2: Convert to fraction form
129.41/193.96 = 115.74/x - Step 3: Cross multiply
129.41x = 193.96 × 115.74 - Step 4: Simplify right side
129.41x = 22,448.64 - Step 5: Solve for x
x = 22,448.64/129.41 - Step 6: Final answer
x = 173.48
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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.