Finding the Fourth Proportional to 122.74, 169.39 and 70.99
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Solution
The fourth proportional to 122.74, 169.39 and 70.99 is: 97.97
Step by Step Solution
- Step 1: Write the proportion equation
122.74 : 169.39 = 70.99 : x - Step 2: Convert to fraction form
122.74/169.39 = 70.99/x - Step 3: Cross multiply
122.74x = 169.39 × 70.99 - Step 4: Simplify right side
122.74x = 12,025.00 - Step 5: Solve for x
x = 12,025.00/122.74 - Step 6: Final answer
x = 97.97
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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.