Finding the Fourth Proportional to 220,232.10, 303,915.19 and 128,345.53
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Solution
The fourth proportional to 220,232.10, 303,915.19 and 128,345.53 is: 177,113.85
Step by Step Solution
- Step 1: Write the proportion equation
220,232.10 : 303,915.19 = 128,345.53 : x - Step 2: Convert to fraction form
220,232.10/303,915.19 = 128,345.53/x - Step 3: Cross multiply
220,232.10x = 303,915.19 × 128,345.53 - Step 4: Simplify right side
220,232.10x = 39,006,156,135.60 - Step 5: Solve for x
x = 39,006,156,135.60/220,232.10 - Step 6: Final answer
x = 177,113.85
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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.