Finding the Fourth Proportional to 110.99, 153.18 and 74.18
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Solution
The fourth proportional to 110.99, 153.18 and 74.18 is: 102.38
Step by Step Solution
- Step 1: Write the proportion equation
110.99 : 153.18 = 74.18 : x - Step 2: Convert to fraction form
110.99/153.18 = 74.18/x - Step 3: Cross multiply
110.99x = 153.18 × 74.18 - Step 4: Simplify right side
110.99x = 11,362.13 - Step 5: Solve for x
x = 11,362.13/110.99 - Step 6: Final answer
x = 102.38
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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.