Finding the Fourth Proportional to 74,945.87, 112,416.13 and 18,786.44
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Solution
The fourth proportional to 74,945.87, 112,416.13 and 18,786.44 is: 28,178.99
Step by Step Solution
- Step 1: Write the proportion equation
74,945.87 : 112,416.13 = 18,786.44 : x - Step 2: Convert to fraction form
74,945.87/112,416.13 = 18,786.44/x - Step 3: Cross multiply
74,945.87x = 112,416.13 × 18,786.44 - Step 4: Simplify right side
74,945.87x = 2,111,899,291.05 - Step 5: Solve for x
x = 2,111,899,291.05/74,945.87 - Step 6: Final answer
x = 28,178.99
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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.