Finding the Fourth Proportional to 116.81, 161.21 and 65.06
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Solution
The fourth proportional to 116.81, 161.21 and 65.06 is: 89.79
Step by Step Solution
- Step 1: Write the proportion equation
116.81 : 161.21 = 65.06 : x - Step 2: Convert to fraction form
116.81/161.21 = 65.06/x - Step 3: Cross multiply
116.81x = 161.21 × 65.06 - Step 4: Simplify right side
116.81x = 10,488.40 - Step 5: Solve for x
x = 10,488.40/116.81 - Step 6: Final answer
x = 89.79
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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.