Finding the Fourth Proportional to 129.60, 193.96 and 126.12
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Solution
The fourth proportional to 129.60, 193.96 and 126.12 is: 188.75
Step by Step Solution
- Step 1: Write the proportion equation
129.60 : 193.96 = 126.12 : x - Step 2: Convert to fraction form
129.60/193.96 = 126.12/x - Step 3: Cross multiply
129.60x = 193.96 × 126.12 - Step 4: Simplify right side
129.60x = 24,462.24 - Step 5: Solve for x
x = 24,462.24/129.60 - Step 6: Final answer
x = 188.75
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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.