Finding the Fourth Proportional to 77.14, 114.99 and 70.12
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Solution
The fourth proportional to 77.14, 114.99 and 70.12 is: 104.53
Step by Step Solution
- Step 1: Write the proportion equation
77.14 : 114.99 = 70.12 : x - Step 2: Convert to fraction form
77.14/114.99 = 70.12/x - Step 3: Cross multiply
77.14x = 114.99 × 70.12 - Step 4: Simplify right side
77.14x = 8,063.10 - Step 5: Solve for x
x = 8,063.10/77.14 - Step 6: Final answer
x = 104.53
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.