Finding the Fourth Proportional to 129,697.32, 178,985.04 and 73,108.68
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Solution
The fourth proportional to 129,697.32, 178,985.04 and 73,108.68 is: 100,891.52
Step by Step Solution
- Step 1: Write the proportion equation
129,697.32 : 178,985.04 = 73,108.68 : x - Step 2: Convert to fraction form
129,697.32/178,985.04 = 73,108.68/x - Step 3: Cross multiply
129,697.32x = 178,985.04 × 73,108.68 - Step 4: Simplify right side
129,697.32x = 13,085,360,014.15 - Step 5: Solve for x
x = 13,085,360,014.15/129,697.32 - Step 6: Final answer
x = 100,891.52
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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.