Finding the Fourth Proportional to 108.36, 162.55 and 31.32
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Solution
The fourth proportional to 108.36, 162.55 and 31.32 is: 46.99
Step by Step Solution
- Step 1: Write the proportion equation
108.36 : 162.55 = 31.32 : x - Step 2: Convert to fraction form
108.36/162.55 = 31.32/x - Step 3: Cross multiply
108.36x = 162.55 × 31.32 - Step 4: Simplify right side
108.36x = 5,091.71 - Step 5: Solve for x
x = 5,091.71/108.36 - Step 6: Final answer
x = 46.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.