Finding the Fourth Proportional to 129,027.92, 178,053.96 and 72,441.68
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Solution
The fourth proportional to 129,027.92, 178,053.96 and 72,441.68 is: 99,966.95
Step by Step Solution
- Step 1: Write the proportion equation
129,027.92 : 178,053.96 = 72,441.68 : x - Step 2: Convert to fraction form
129,027.92/178,053.96 = 72,441.68/x - Step 3: Cross multiply
129,027.92x = 178,053.96 × 72,441.68 - Step 4: Simplify right side
129,027.92x = 12,898,527,993.05 - Step 5: Solve for x
x = 12,898,527,993.05/129,027.92 - Step 6: Final answer
x = 99,966.95
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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.