Finding the Fourth Proportional to 208,128.23, 312,000.99 and 74,975.93
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Solution
The fourth proportional to 208,128.23, 312,000.99 and 74,975.93 is: 112,394.95
Step by Step Solution
- Step 1: Write the proportion equation
208,128.23 : 312,000.99 = 74,975.93 : x - Step 2: Convert to fraction form
208,128.23/312,000.99 = 74,975.93/x - Step 3: Cross multiply
208,128.23x = 312,000.99 × 74,975.93 - Step 4: Simplify right side
208,128.23x = 23,392,562,451.29 - Step 5: Solve for x
x = 23,392,562,451.29/208,128.23 - Step 6: Final answer
x = 112,394.95
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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.