Finding the Fourth Proportional to 139,315.14, 192,354.75 and 85,672.08
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Solution
The fourth proportional to 139,315.14, 192,354.75 and 85,672.08 is: 118,288.88
Step by Step Solution
- Step 1: Write the proportion equation
139,315.14 : 192,354.75 = 85,672.08 : x - Step 2: Convert to fraction form
139,315.14/192,354.75 = 85,672.08/x - Step 3: Cross multiply
139,315.14x = 192,354.75 × 85,672.08 - Step 4: Simplify right side
139,315.14x = 16,479,431,530.38 - Step 5: Solve for x
x = 16,479,431,530.38/139,315.14 - Step 6: Final answer
x = 118,288.88
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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.