Finding the Fourth Proportional to 93.81, 129.36 and 68.80
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Solution
The fourth proportional to 93.81, 129.36 and 68.80 is: 94.87
Step by Step Solution
- Step 1: Write the proportion equation
93.81 : 129.36 = 68.80 : x - Step 2: Convert to fraction form
93.81/129.36 = 68.80/x - Step 3: Cross multiply
93.81x = 129.36 × 68.80 - Step 4: Simplify right side
93.81x = 8,899.97 - Step 5: Solve for x
x = 8,899.97/93.81 - Step 6: Final answer
x = 94.87
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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.