Finding the Fourth Proportional to 78, 116.83 and 60.75
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Solution
The fourth proportional to 78, 116.83 and 60.75 is: 90.99
Step by Step Solution
- Step 1: Write the proportion equation
78 : 116.83 = 60.75 : x - Step 2: Convert to fraction form
78/116.83 = 60.75/x - Step 3: Cross multiply
78x = 116.83 × 60.75 - Step 4: Simplify right side
78x = 7,097.42 - Step 5: Solve for x
x = 7,097.42/78 - Step 6: Final answer
x = 90.99
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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.