Finding the Fourth Proportional to 84.96, 117.18 and 55.88
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Solution
The fourth proportional to 84.96, 117.18 and 55.88 is: 77.07
Step by Step Solution
- Step 1: Write the proportion equation
84.96 : 117.18 = 55.88 : x - Step 2: Convert to fraction form
84.96/117.18 = 55.88/x - Step 3: Cross multiply
84.96x = 117.18 × 55.88 - Step 4: Simplify right side
84.96x = 6,548.02 - Step 5: Solve for x
x = 6,548.02/84.96 - Step 6: Final answer
x = 77.07
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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.