Finding the Fourth Proportional to 172.41, 258.59 and 69.68
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Solution
The fourth proportional to 172.41, 258.59 and 69.68 is: 104.50
Step by Step Solution
- Step 1: Write the proportion equation
172.41 : 258.59 = 69.68 : x - Step 2: Convert to fraction form
172.41/258.59 = 69.68/x - Step 3: Cross multiply
172.41x = 258.59 × 69.68 - Step 4: Simplify right side
172.41x = 18,016.91 - Step 5: Solve for x
x = 18,016.91/172.41 - Step 6: Final answer
x = 104.50
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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.