Finding the Fourth Proportional to 105,689.26, 145,853.22 and 57,939.76
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Solution
The fourth proportional to 105,689.26, 145,853.22 and 57,939.76 is: 79,957.99
Step by Step Solution
- Step 1: Write the proportion equation
105,689.26 : 145,853.22 = 57,939.76 : x - Step 2: Convert to fraction form
105,689.26/145,853.22 = 57,939.76/x - Step 3: Cross multiply
105,689.26x = 145,853.22 × 57,939.76 - Step 4: Simplify right side
105,689.26x = 8,450,700,562.03 - Step 5: Solve for x
x = 8,450,700,562.03/105,689.26 - Step 6: Final answer
x = 79,957.99
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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.