Finding the Fourth Proportional to 79.99, 110.45 and 55.42
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Solution
The fourth proportional to 79.99, 110.45 and 55.42 is: 76.52
Step by Step Solution
- Step 1: Write the proportion equation
79.99 : 110.45 = 55.42 : x - Step 2: Convert to fraction form
79.99/110.45 = 55.42/x - Step 3: Cross multiply
79.99x = 110.45 × 55.42 - Step 4: Simplify right side
79.99x = 6,121.14 - Step 5: Solve for x
x = 6,121.14/79.99 - Step 6: Final answer
x = 76.52
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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.