Finding the Fourth Proportional to 79.74, 119.80 and 55.82
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Solution
The fourth proportional to 79.74, 119.80 and 55.82 is: 83.86
Step by Step Solution
- Step 1: Write the proportion equation
79.74 : 119.80 = 55.82 : x - Step 2: Convert to fraction form
79.74/119.80 = 55.82/x - Step 3: Cross multiply
79.74x = 119.80 × 55.82 - Step 4: Simplify right side
79.74x = 6,687.24 - Step 5: Solve for x
x = 6,687.24/79.74 - Step 6: Final answer
x = 83.86
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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.