Finding the Fourth Proportional to 157.19, 216.92 and 88.19
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Solution
The fourth proportional to 157.19, 216.92 and 88.19 is: 121.70
Step by Step Solution
- Step 1: Write the proportion equation
157.19 : 216.92 = 88.19 : x - Step 2: Convert to fraction form
157.19/216.92 = 88.19/x - Step 3: Cross multiply
157.19x = 216.92 × 88.19 - Step 4: Simplify right side
157.19x = 19,130.17 - Step 5: Solve for x
x = 19,130.17/157.19 - Step 6: Final answer
x = 121.70
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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.