Finding the Fourth Proportional to 93.49, 128.79 and 87.62
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Solution
The fourth proportional to 93.49, 128.79 and 87.62 is: 120.70
Step by Step Solution
- Step 1: Write the proportion equation
93.49 : 128.79 = 87.62 : x - Step 2: Convert to fraction form
93.49/128.79 = 87.62/x - Step 3: Cross multiply
93.49x = 128.79 × 87.62 - Step 4: Simplify right side
93.49x = 11,283.94 - Step 5: Solve for x
x = 11,283.94/93.49 - Step 6: Final answer
x = 120.70
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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.