Finding the Fourth Proportional to 91,079.07, 135,702.88 and 85,986.09
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Solution
The fourth proportional to 91,079.07, 135,702.88 and 85,986.09 is: 128,114.62
Step by Step Solution
- Step 1: Write the proportion equation
91,079.07 : 135,702.88 = 85,986.09 : x - Step 2: Convert to fraction form
91,079.07/135,702.88 = 85,986.09/x - Step 3: Cross multiply
91,079.07x = 135,702.88 × 85,986.09 - Step 4: Simplify right side
91,079.07x = 11,668,560,346.86 - Step 5: Solve for x
x = 11,668,560,346.86/91,079.07 - Step 6: Final answer
x = 128,114.62
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.