Finding the Fourth Proportional to 93.08, 128.64 and 81.44
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Solution
The fourth proportional to 93.08, 128.64 and 81.44 is: 112.55
Step by Step Solution
- Step 1: Write the proportion equation
93.08 : 128.64 = 81.44 : x - Step 2: Convert to fraction form
93.08/128.64 = 81.44/x - Step 3: Cross multiply
93.08x = 128.64 × 81.44 - Step 4: Simplify right side
93.08x = 10,476.44 - Step 5: Solve for x
x = 10,476.44/93.08 - Step 6: Final answer
x = 112.55
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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.