Finding the Third Proportional to 103 and 129
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Solution
The third proportional to 103 and 129 is: 161.56
Step by Step Solution
- Step 1: Write the proportion equation
103 : 129 = 129 : x - Step 2: Convert to fraction form
103/129 = 129/x - Step 3: Cross multiply
103x = 129 × 129 - Step 4: Simplify right side
103x = 16,641 - Step 5: Solve for x
x = 16,641/103 - Step 6: Final answer
x = 161.56
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Why These Related Problems?
These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.