Finding the Fourth Proportional to 129,240.96, 178,351.68 and 72,652.80
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Solution
The fourth proportional to 129,240.96, 178,351.68 and 72,652.80 is: 100,260.39
Step by Step Solution
- Step 1: Write the proportion equation
129,240.96 : 178,351.68 = 72,652.80 : x - Step 2: Convert to fraction form
129,240.96/178,351.68 = 72,652.80/x - Step 3: Cross multiply
129,240.96x = 178,351.68 × 72,652.80 - Step 4: Simplify right side
129,240.96x = 12,957,748,936.70 - Step 5: Solve for x
x = 12,957,748,936.70/129,240.96 - Step 6: Final answer
x = 100,260.39
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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.