Finding the Fourth Proportional to 139,939.08, 193,115.98 and 79,509.80
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Solution
The fourth proportional to 139,939.08, 193,115.98 and 79,509.80 is: 109,723.55
Step by Step Solution
- Step 1: Write the proportion equation
139,939.08 : 193,115.98 = 79,509.80 : x - Step 2: Convert to fraction form
139,939.08/193,115.98 = 79,509.80/x - Step 3: Cross multiply
139,939.08x = 193,115.98 × 79,509.80 - Step 4: Simplify right side
139,939.08x = 15,354,611,995.26 - Step 5: Solve for x
x = 15,354,611,995.26/139,939.08 - Step 6: Final answer
x = 109,723.55
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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.