Finding the Fourth Proportional to 154,382.88, 212,980.74 and 90,691.94
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Solution
The fourth proportional to 154,382.88, 212,980.74 and 90,691.94 is: 125,115.15
Step by Step Solution
- Step 1: Write the proportion equation
154,382.88 : 212,980.74 = 90,691.94 : x - Step 2: Convert to fraction form
154,382.88/212,980.74 = 90,691.94/x - Step 3: Cross multiply
154,382.88x = 212,980.74 × 90,691.94 - Step 4: Simplify right side
154,382.88x = 19,315,636,493.24 - Step 5: Solve for x
x = 19,315,636,493.24/154,382.88 - Step 6: Final answer
x = 125,115.15
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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.