Finding the Fourth Proportional to 129,316.68, 178,450.50 and 72,724.68
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Solution
The fourth proportional to 129,316.68, 178,450.50 and 72,724.68 is: 100,356.39
Step by Step Solution
- Step 1: Write the proportion equation
129,316.68 : 178,450.50 = 72,724.68 : x - Step 2: Convert to fraction form
129,316.68/178,450.50 = 72,724.68/x - Step 3: Cross multiply
129,316.68x = 178,450.50 × 72,724.68 - Step 4: Simplify right side
129,316.68x = 12,977,755,508.34 - Step 5: Solve for x
x = 12,977,755,508.34/129,316.68 - Step 6: Final answer
x = 100,356.39
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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.