Finding the Fourth Proportional to 85,934.70, 128,975.86 and 48,531.54
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Solution
The fourth proportional to 85,934.70, 128,975.86 and 48,531.54 is: 72,838.99
Step by Step Solution
- Step 1: Write the proportion equation
85,934.70 : 128,975.86 = 48,531.54 : x - Step 2: Convert to fraction form
85,934.70/128,975.86 = 48,531.54/x - Step 3: Cross multiply
85,934.70x = 128,975.86 × 48,531.54 - Step 4: Simplify right side
85,934.70x = 6,259,397,108.62 - Step 5: Solve for x
x = 6,259,397,108.62/85,934.70 - Step 6: Final answer
x = 72,838.99
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.