Finding the Fourth Proportional to 208,021.60, 312,247.76 and 128,117.12
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Solution
The fourth proportional to 208,021.60, 312,247.76 and 128,117.12 is: 192,308.32
Step by Step Solution
- Step 1: Write the proportion equation
208,021.60 : 312,247.76 = 128,117.12 : x - Step 2: Convert to fraction form
208,021.60/312,247.76 = 128,117.12/x - Step 3: Cross multiply
208,021.60x = 312,247.76 × 128,117.12 - Step 4: Simplify right side
208,021.60x = 40,004,283,737.65 - Step 5: Solve for x
x = 40,004,283,737.65/208,021.60 - Step 6: Final answer
x = 192,308.32
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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.