Finding the Fourth Proportional to 71,220.78, 106,837.38 and 18,630.18
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Solution
The fourth proportional to 71,220.78, 106,837.38 and 18,630.18 is: 27,946.89
Step by Step Solution
- Step 1: Write the proportion equation
71,220.78 : 106,837.38 = 18,630.18 : x - Step 2: Convert to fraction form
71,220.78/106,837.38 = 18,630.18/x - Step 3: Cross multiply
71,220.78x = 106,837.38 × 18,630.18 - Step 4: Simplify right side
71,220.78x = 1,990,399,620.13 - Step 5: Solve for x
x = 1,990,399,620.13/71,220.78 - Step 6: Final answer
x = 27,946.89
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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.