Finding the Fourth Proportional to 78.33, 117.55 and 34.99
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Solution
The fourth proportional to 78.33, 117.55 and 34.99 is: 52.50
Step by Step Solution
- Step 1: Write the proportion equation
78.33 : 117.55 = 34.99 : x - Step 2: Convert to fraction form
78.33/117.55 = 34.99/x - Step 3: Cross multiply
78.33x = 117.55 × 34.99 - Step 4: Simplify right side
78.33x = 4,112.54 - Step 5: Solve for x
x = 4,112.54/78.33 - Step 6: Final answer
x = 52.50
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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.