Finding the Fourth Proportional to 129,432.70, 178,629.18 and 75,714.31
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Solution
The fourth proportional to 129,432.70, 178,629.18 and 75,714.31 is: 104,492.80
Step by Step Solution
- Step 1: Write the proportion equation
129,432.70 : 178,629.18 = 75,714.31 : x - Step 2: Convert to fraction form
129,432.70/178,629.18 = 75,714.31/x - Step 3: Cross multiply
129,432.70x = 178,629.18 × 75,714.31 - Step 4: Simplify right side
129,432.70x = 13,524,784,216.42 - Step 5: Solve for x
x = 13,524,784,216.42/129,432.70 - Step 6: Final answer
x = 104,492.80
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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.