Finding the Fourth Proportional to 147.17, 203.09 and 81.68
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Solution
The fourth proportional to 147.17, 203.09 and 81.68 is: 112.70
Step by Step Solution
- Step 1: Write the proportion equation
147.17 : 203.09 = 81.68 : x - Step 2: Convert to fraction form
147.17/203.09 = 81.68/x - Step 3: Cross multiply
147.17x = 203.09 × 81.68 - Step 4: Simplify right side
147.17x = 16,586.97 - Step 5: Solve for x
x = 16,586.97/147.17 - Step 6: Final answer
x = 112.70
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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.