Finding the Fourth Proportional to 87,642.18, 120,939.21 and 51,833.70
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Solution
The fourth proportional to 87,642.18, 120,939.21 and 51,833.70 is: 71,526.37
Step by Step Solution
- Step 1: Write the proportion equation
87,642.18 : 120,939.21 = 51,833.70 : x - Step 2: Convert to fraction form
87,642.18/120,939.21 = 51,833.70/x - Step 3: Cross multiply
87,642.18x = 120,939.21 × 51,833.70 - Step 4: Simplify right side
87,642.18x = 6,268,726,729.38 - Step 5: Solve for x
x = 6,268,726,729.38/87,642.18 - Step 6: Final answer
x = 71,526.37
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1.5x scale
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.