Finding the Fourth Proportional to 129.74, 194.40 and 92.99
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Solution
The fourth proportional to 129.74, 194.40 and 92.99 is: 139.34
Step by Step Solution
- Step 1: Write the proportion equation
129.74 : 194.40 = 92.99 : x - Step 2: Convert to fraction form
129.74/194.40 = 92.99/x - Step 3: Cross multiply
129.74x = 194.40 × 92.99 - Step 4: Simplify right side
129.74x = 18,077.74 - Step 5: Solve for x
x = 18,077.74/129.74 - Step 6: Final answer
x = 139.34
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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.