Finding the Fourth Proportional to 108.63, 149.91 and 64.99
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Solution
The fourth proportional to 108.63, 149.91 and 64.99 is: 89.68
Step by Step Solution
- Step 1: Write the proportion equation
108.63 : 149.91 = 64.99 : x - Step 2: Convert to fraction form
108.63/149.91 = 64.99/x - Step 3: Cross multiply
108.63x = 149.91 × 64.99 - Step 4: Simplify right side
108.63x = 9,742.33 - Step 5: Solve for x
x = 9,742.33/108.63 - Step 6: Final answer
x = 89.68
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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.