Finding the Fourth Proportional to 154.19, 212.81 and 98.99
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Solution
The fourth proportional to 154.19, 212.81 and 98.99 is: 136.63
Step by Step Solution
- Step 1: Write the proportion equation
154.19 : 212.81 = 98.99 : x - Step 2: Convert to fraction form
154.19/212.81 = 98.99/x - Step 3: Cross multiply
154.19x = 212.81 × 98.99 - Step 4: Simplify right side
154.19x = 21,066.10 - Step 5: Solve for x
x = 21,066.10/154.19 - Step 6: Final answer
x = 136.63
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.