Finding the Fourth Proportional to 84.71, 126.99 and 55.79
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Solution
The fourth proportional to 84.71, 126.99 and 55.79 is: 83.63
Step by Step Solution
- Step 1: Write the proportion equation
84.71 : 126.99 = 55.79 : x - Step 2: Convert to fraction form
84.71/126.99 = 55.79/x - Step 3: Cross multiply
84.71x = 126.99 × 55.79 - Step 4: Simplify right side
84.71x = 7,084.14 - Step 5: Solve for x
x = 7,084.14/84.71 - Step 6: Final answer
x = 83.63
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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.