Finding the Fourth Proportional to 129.62, 193.88 and 102.62
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Solution
The fourth proportional to 129.62, 193.88 and 102.62 is: 153.49
Step by Step Solution
- Step 1: Write the proportion equation
129.62 : 193.88 = 102.62 : x - Step 2: Convert to fraction form
129.62/193.88 = 102.62/x - Step 3: Cross multiply
129.62x = 193.88 × 102.62 - Step 4: Simplify right side
129.62x = 19,895.97 - Step 5: Solve for x
x = 19,895.97/129.62 - Step 6: Final answer
x = 153.49
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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.