Finding the Fourth Proportional to 105,383.28, 145,431.78 and 57,639.44
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Solution
The fourth proportional to 105,383.28, 145,431.78 and 57,639.44 is: 79,543.99
Step by Step Solution
- Step 1: Write the proportion equation
105,383.28 : 145,431.78 = 57,639.44 : x - Step 2: Convert to fraction form
105,383.28/145,431.78 = 57,639.44/x - Step 3: Cross multiply
105,383.28x = 145,431.78 × 57,639.44 - Step 4: Simplify right side
105,383.28x = 8,382,606,357.40 - Step 5: Solve for x
x = 8,382,606,357.40/105,383.28 - Step 6: Final answer
x = 79,543.99
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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.