Finding the Fourth Proportional to 76.70, 115.05 and 63.13
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Solution
The fourth proportional to 76.70, 115.05 and 63.13 is: 94.70
Step by Step Solution
- Step 1: Write the proportion equation
76.70 : 115.05 = 63.13 : x - Step 2: Convert to fraction form
76.70/115.05 = 63.13/x - Step 3: Cross multiply
76.70x = 115.05 × 63.13 - Step 4: Simplify right side
76.70x = 7,263.24 - Step 5: Solve for x
x = 7,263.24/76.70 - Step 6: Final answer
x = 94.70
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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.