Finding the Fourth Proportional to 117.48, 175.89 and 86.82
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Solution
The fourth proportional to 117.48, 175.89 and 86.82 is: 129.99
Step by Step Solution
- Step 1: Write the proportion equation
117.48 : 175.89 = 86.82 : x - Step 2: Convert to fraction form
117.48/175.89 = 86.82/x - Step 3: Cross multiply
117.48x = 175.89 × 86.82 - Step 4: Simplify right side
117.48x = 15,270.77 - Step 5: Solve for x
x = 15,270.77/117.48 - Step 6: Final answer
x = 129.99
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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.