Finding the Fourth Proportional to 87,839.30, 121,217.21 and 47,552.18
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Solution
The fourth proportional to 87,839.30, 121,217.21 and 47,552.18 is: 65,621.45
Step by Step Solution
- Step 1: Write the proportion equation
87,839.30 : 121,217.21 = 47,552.18 : x - Step 2: Convert to fraction form
87,839.30/121,217.21 = 47,552.18/x - Step 3: Cross multiply
87,839.30x = 121,217.21 × 47,552.18 - Step 4: Simplify right side
87,839.30x = 5,764,141,745.17 - Step 5: Solve for x
x = 5,764,141,745.17/87,839.30 - Step 6: Final answer
x = 65,621.45
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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.