Finding the Fourth Proportional to 108.91, 150.34 and 69.61
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Solution
The fourth proportional to 108.91, 150.34 and 69.61 is: 96.09
Step by Step Solution
- Step 1: Write the proportion equation
108.91 : 150.34 = 69.61 : x - Step 2: Convert to fraction form
108.91/150.34 = 69.61/x - Step 3: Cross multiply
108.91x = 150.34 × 69.61 - Step 4: Simplify right side
108.91x = 10,464.42 - Step 5: Solve for x
x = 10,464.42/108.91 - Step 6: Final answer
x = 96.09
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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.