Finding the Fourth Proportional to 98,891.28, 136,479.74 and 56,456.19
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Solution
The fourth proportional to 98,891.28, 136,479.74 and 56,456.19 is: 77,915.12
Step by Step Solution
- Step 1: Write the proportion equation
98,891.28 : 136,479.74 = 56,456.19 : x - Step 2: Convert to fraction form
98,891.28/136,479.74 = 56,456.19/x - Step 3: Cross multiply
98,891.28x = 136,479.74 × 56,456.19 - Step 4: Simplify right side
98,891.28x = 7,705,125,850.31 - Step 5: Solve for x
x = 7,705,125,850.31/98,891.28 - Step 6: Final answer
x = 77,915.12
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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.