Finding the Fourth Proportional to 143,938.56, 198,635.23 and 80,274.99
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Solution
The fourth proportional to 143,938.56, 198,635.23 and 80,274.99 is: 110,779.50
Step by Step Solution
- Step 1: Write the proportion equation
143,938.56 : 198,635.23 = 80,274.99 : x - Step 2: Convert to fraction form
143,938.56/198,635.23 = 80,274.99/x - Step 3: Cross multiply
143,938.56x = 198,635.23 × 80,274.99 - Step 4: Simplify right side
143,938.56x = 15,945,441,101.90 - Step 5: Solve for x
x = 15,945,441,101.90/143,938.56 - Step 6: Final answer
x = 110,779.50
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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.