Finding the Fourth Proportional to 84.78, 116.93 and 51.99
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Solution
The fourth proportional to 84.78, 116.93 and 51.99 is: 71.70
Step by Step Solution
- Step 1: Write the proportion equation
84.78 : 116.93 = 51.99 : x - Step 2: Convert to fraction form
84.78/116.93 = 51.99/x - Step 3: Cross multiply
84.78x = 116.93 × 51.99 - Step 4: Simplify right side
84.78x = 6,078.61 - Step 5: Solve for x
x = 6,078.61/84.78 - Step 6: Final answer
x = 71.70
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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.