Finding the Fourth Proportional to 129.05, 177.92 and 92.19
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Solution
The fourth proportional to 129.05, 177.92 and 92.19 is: 127.11
Step by Step Solution
- Step 1: Write the proportion equation
129.05 : 177.92 = 92.19 : x - Step 2: Convert to fraction form
129.05/177.92 = 92.19/x - Step 3: Cross multiply
129.05x = 177.92 × 92.19 - Step 4: Simplify right side
129.05x = 16,402.68 - Step 5: Solve for x
x = 16,402.68/129.05 - Step 6: Final answer
x = 127.11
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.