Finding the Fourth Proportional to 129,328.87, 178,372.71 and 84,021.44
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Solution
The fourth proportional to 129,328.87, 178,372.71 and 84,021.44 is: 115,883.89
Step by Step Solution
- Step 1: Write the proportion equation
129,328.87 : 178,372.71 = 84,021.44 : x - Step 2: Convert to fraction form
129,328.87/178,372.71 = 84,021.44/x - Step 3: Cross multiply
129,328.87x = 178,372.71 × 84,021.44 - Step 4: Simplify right side
129,328.87x = 14,987,131,950.90 - Step 5: Solve for x
x = 14,987,131,950.90/129,328.87 - Step 6: Final answer
x = 115,883.89
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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.