Finding the Fourth Proportional to 102,438.99, 141,355.44 and 57,112.68
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Solution
The fourth proportional to 102,438.99, 141,355.44 and 57,112.68 is: 78,809.72
Step by Step Solution
- Step 1: Write the proportion equation
102,438.99 : 141,355.44 = 57,112.68 : x - Step 2: Convert to fraction form
102,438.99/141,355.44 = 57,112.68/x - Step 3: Cross multiply
102,438.99x = 141,355.44 × 57,112.68 - Step 4: Simplify right side
102,438.99x = 8,073,188,010.98 - Step 5: Solve for x
x = 8,073,188,010.98/102,438.99 - Step 6: Final answer
x = 78,809.72
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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.