Finding the Fourth Proportional to 87,847.30, 121,249.20 and 68,689.18
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Solution
The fourth proportional to 87,847.30, 121,249.20 and 68,689.18 is: 94,806.65
Step by Step Solution
- Step 1: Write the proportion equation
87,847.30 : 121,249.20 = 68,689.18 : x - Step 2: Convert to fraction form
87,847.30/121,249.20 = 68,689.18/x - Step 3: Cross multiply
87,847.30x = 121,249.20 × 68,689.18 - Step 4: Simplify right side
87,847.30x = 8,328,508,123.66 - Step 5: Solve for x
x = 8,328,508,123.66/87,847.30 - Step 6: Final answer
x = 94,806.65
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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.