Finding the Fourth Proportional to 142,990.16, 197,310.60 and 79,312.08
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Solution
The fourth proportional to 142,990.16, 197,310.60 and 79,312.08 is: 109,441.90
Step by Step Solution
- Step 1: Write the proportion equation
142,990.16 : 197,310.60 = 79,312.08 : x - Step 2: Convert to fraction form
142,990.16/197,310.60 = 79,312.08/x - Step 3: Cross multiply
142,990.16x = 197,310.60 × 79,312.08 - Step 4: Simplify right side
142,990.16x = 15,649,114,092.05 - Step 5: Solve for x
x = 15,649,114,092.05/142,990.16 - Step 6: Final answer
x = 109,441.90
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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.