Finding the Fourth Proportional to 129.57, 178.89 and 92.70
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Solution
The fourth proportional to 129.57, 178.89 and 92.70 is: 127.99
Step by Step Solution
- Step 1: Write the proportion equation
129.57 : 178.89 = 92.70 : x - Step 2: Convert to fraction form
129.57/178.89 = 92.70/x - Step 3: Cross multiply
129.57x = 178.89 × 92.70 - Step 4: Simplify right side
129.57x = 16,583.10 - Step 5: Solve for x
x = 16,583.10/129.57 - Step 6: Final answer
x = 127.99
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.