Finding the Fourth Proportional to 129.62, 178.71 and 104.99
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Solution
The fourth proportional to 129.62, 178.71 and 104.99 is: 144.75
Step by Step Solution
- Step 1: Write the proportion equation
129.62 : 178.71 = 104.99 : x - Step 2: Convert to fraction form
129.62/178.71 = 104.99/x - Step 3: Cross multiply
129.62x = 178.71 × 104.99 - Step 4: Simplify right side
129.62x = 18,761.87 - Step 5: Solve for x
x = 18,761.87/129.62 - Step 6: Final answer
x = 144.75
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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.