Finding the Fourth Proportional to 129.12, 193.61 and 63.99
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Solution
The fourth proportional to 129.12, 193.61 and 63.99 is: 95.95
Step by Step Solution
- Step 1: Write the proportion equation
129.12 : 193.61 = 63.99 : x - Step 2: Convert to fraction form
129.12/193.61 = 63.99/x - Step 3: Cross multiply
129.12x = 193.61 × 63.99 - Step 4: Simplify right side
129.12x = 12,389.08 - Step 5: Solve for x
x = 12,389.08/129.12 - Step 6: Final answer
x = 95.95
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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.