Finding the Fourth Proportional to 79.61, 109.82 and 50.09
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Solution
The fourth proportional to 79.61, 109.82 and 50.09 is: 69.09
Step by Step Solution
- Step 1: Write the proportion equation
79.61 : 109.82 = 50.09 : x - Step 2: Convert to fraction form
79.61/109.82 = 50.09/x - Step 3: Cross multiply
79.61x = 109.82 × 50.09 - Step 4: Simplify right side
79.61x = 5,500.08 - Step 5: Solve for x
x = 5,500.08/79.61 - Step 6: Final answer
x = 69.09
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.