Finding the Fourth Proportional to 153.68, 212.09 and 88.18
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Solution
The fourth proportional to 153.68, 212.09 and 88.18 is: 121.69
Step by Step Solution
- Step 1: Write the proportion equation
153.68 : 212.09 = 88.18 : x - Step 2: Convert to fraction form
153.68/212.09 = 88.18/x - Step 3: Cross multiply
153.68x = 212.09 × 88.18 - Step 4: Simplify right side
153.68x = 18,701.13 - Step 5: Solve for x
x = 18,701.13/153.68 - Step 6: Final answer
x = 121.69
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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.