Finding the Fourth Proportional to 129.67, 193.35 and 115.99
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Solution
The fourth proportional to 129.67, 193.35 and 115.99 is: 172.95
Step by Step Solution
- Step 1: Write the proportion equation
129.67 : 193.35 = 115.99 : x - Step 2: Convert to fraction form
129.67/193.35 = 115.99/x - Step 3: Cross multiply
129.67x = 193.35 × 115.99 - Step 4: Simplify right side
129.67x = 22,426.67 - Step 5: Solve for x
x = 22,426.67/129.67 - Step 6: Final answer
x = 172.95
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.