Finding the Fourth Proportional to 77.05, 115.80 and 52.75
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Solution
The fourth proportional to 77.05, 115.80 and 52.75 is: 79.28
Step by Step Solution
- Step 1: Write the proportion equation
77.05 : 115.80 = 52.75 : x - Step 2: Convert to fraction form
77.05/115.80 = 52.75/x - Step 3: Cross multiply
77.05x = 115.80 × 52.75 - Step 4: Simplify right side
77.05x = 6,108.40 - Step 5: Solve for x
x = 6,108.40/77.05 - Step 6: Final answer
x = 79.28
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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.