Finding the Fourth Proportional to 129.74, 178.97 and 98.60
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Solution
The fourth proportional to 129.74, 178.97 and 98.60 is: 136.01
Step by Step Solution
- Step 1: Write the proportion equation
129.74 : 178.97 = 98.60 : x - Step 2: Convert to fraction form
129.74/178.97 = 98.60/x - Step 3: Cross multiply
129.74x = 178.97 × 98.60 - Step 4: Simplify right side
129.74x = 17,646.44 - Step 5: Solve for x
x = 17,646.44/129.74 - Step 6: Final answer
x = 136.01
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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.