Finding the Fourth Proportional to 77,079.68, 115,635.84 and 27,157.76
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Solution
The fourth proportional to 77,079.68, 115,635.84 and 27,157.76 is: 40,742.39
Step by Step Solution
- Step 1: Write the proportion equation
77,079.68 : 115,635.84 = 27,157.76 : x - Step 2: Convert to fraction form
77,079.68/115,635.84 = 27,157.76/x - Step 3: Cross multiply
77,079.68x = 115,635.84 × 27,157.76 - Step 4: Simplify right side
77,079.68x = 3,140,410,390.12 - Step 5: Solve for x
x = 3,140,410,390.12/77,079.68 - Step 6: Final answer
x = 40,742.39
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.