Finding the Fourth Proportional to 122.60, 169.18 and 81.08
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Solution
The fourth proportional to 122.60, 169.18 and 81.08 is: 111.88
Step by Step Solution
- Step 1: Write the proportion equation
122.60 : 169.18 = 81.08 : x - Step 2: Convert to fraction form
122.60/169.18 = 81.08/x - Step 3: Cross multiply
122.60x = 169.18 × 81.08 - Step 4: Simplify right side
122.60x = 13,716.71 - Step 5: Solve for x
x = 13,716.71/122.60 - Step 6: Final answer
x = 111.88
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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.