Finding the Fourth Proportional to 117.08, 161.59 and 67.31
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Solution
The fourth proportional to 117.08, 161.59 and 67.31 is: 92.90
Step by Step Solution
- Step 1: Write the proportion equation
117.08 : 161.59 = 67.31 : x - Step 2: Convert to fraction form
117.08/161.59 = 67.31/x - Step 3: Cross multiply
117.08x = 161.59 × 67.31 - Step 4: Simplify right side
117.08x = 10,876.29 - Step 5: Solve for x
x = 10,876.29/117.08 - Step 6: Final answer
x = 92.90
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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.