Finding the Fourth Proportional to 129,130.16, 193,278.60 and 66,714.80
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Solution
The fourth proportional to 129,130.16, 193,278.60 and 66,714.80 is: 99,856.94
Step by Step Solution
- Step 1: Write the proportion equation
129,130.16 : 193,278.60 = 66,714.80 : x - Step 2: Convert to fraction form
129,130.16/193,278.60 = 66,714.80/x - Step 3: Cross multiply
129,130.16x = 193,278.60 × 66,714.80 - Step 4: Simplify right side
129,130.16x = 12,894,543,143.28 - Step 5: Solve for x
x = 12,894,543,143.28/129,130.16 - Step 6: Final answer
x = 99,856.94
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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.