Finding the Fourth Proportional to 129.14, 193.74 and 68.26
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Solution
The fourth proportional to 129.14, 193.74 and 68.26 is: 102.40
Step by Step Solution
- Step 1: Write the proportion equation
129.14 : 193.74 = 68.26 : x - Step 2: Convert to fraction form
129.14/193.74 = 68.26/x - Step 3: Cross multiply
129.14x = 193.74 × 68.26 - Step 4: Simplify right side
129.14x = 13,223.87 - Step 5: Solve for x
x = 13,223.87/129.14 - Step 6: Final answer
x = 102.40
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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.