Finding the Fourth Proportional to 84.94, 117.14 and 74.62
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Solution
The fourth proportional to 84.94, 117.14 and 74.62 is: 102.91
Step by Step Solution
- Step 1: Write the proportion equation
84.94 : 117.14 = 74.62 : x - Step 2: Convert to fraction form
84.94/117.14 = 74.62/x - Step 3: Cross multiply
84.94x = 117.14 × 74.62 - Step 4: Simplify right side
84.94x = 8,740.99 - Step 5: Solve for x
x = 8,740.99/84.94 - Step 6: Final answer
x = 102.91
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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.