Finding the Fourth Proportional to 129.29, 178.36 and 80.08
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Solution
The fourth proportional to 129.29, 178.36 and 80.08 is: 110.48
Step by Step Solution
- Step 1: Write the proportion equation
129.29 : 178.36 = 80.08 : x - Step 2: Convert to fraction form
129.29/178.36 = 80.08/x - Step 3: Cross multiply
129.29x = 178.36 × 80.08 - Step 4: Simplify right side
129.29x = 14,283.07 - Step 5: Solve for x
x = 14,283.07/129.29 - Step 6: Final answer
x = 110.48
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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.