Finding the Fourth Proportional to 139,832.85, 192,968.37 and 76,170.66
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Solution
The fourth proportional to 139,832.85, 192,968.37 and 76,170.66 is: 105,114.99
Step by Step Solution
- Step 1: Write the proportion equation
139,832.85 : 192,968.37 = 76,170.66 : x - Step 2: Convert to fraction form
139,832.85/192,968.37 = 76,170.66/x - Step 3: Cross multiply
139,832.85x = 192,968.37 × 76,170.66 - Step 4: Simplify right side
139,832.85x = 14,698,528,102.02 - Step 5: Solve for x
x = 14,698,528,102.02/139,832.85 - Step 6: Final answer
x = 105,114.99
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1.5x scale
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.