Finding the Fourth Proportional to 71,439.91, 107,149.33 and 18,853.09
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Solution
The fourth proportional to 71,439.91, 107,149.33 and 18,853.09 is: 28,276.85
Step by Step Solution
- Step 1: Write the proportion equation
71,439.91 : 107,149.33 = 18,853.09 : x - Step 2: Convert to fraction form
71,439.91/107,149.33 = 18,853.09/x - Step 3: Cross multiply
71,439.91x = 107,149.33 × 18,853.09 - Step 4: Simplify right side
71,439.91x = 2,020,095,961.93 - Step 5: Solve for x
x = 2,020,095,961.93/71,439.91 - Step 6: Final answer
x = 28,276.85
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1.5x scale
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.