Finding the Fourth Proportional to 122.96, 169.66 and 76.36
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Solution
The fourth proportional to 122.96, 169.66 and 76.36 is: 105.36
Step by Step Solution
- Step 1: Write the proportion equation
122.96 : 169.66 = 76.36 : x - Step 2: Convert to fraction form
122.96/169.66 = 76.36/x - Step 3: Cross multiply
122.96x = 169.66 × 76.36 - Step 4: Simplify right side
122.96x = 12,955.24 - Step 5: Solve for x
x = 12,955.24/122.96 - Step 6: Final answer
x = 105.36
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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.