Finding the Fourth Proportional to 129,156.16, 193,317.60 and 66,740.80
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Solution
The fourth proportional to 129,156.16, 193,317.60 and 66,740.80 is: 99,895.90
Step by Step Solution
- Step 1: Write the proportion equation
129,156.16 : 193,317.60 = 66,740.80 : x - Step 2: Convert to fraction form
129,156.16/193,317.60 = 66,740.80/x - Step 3: Cross multiply
129,156.16x = 193,317.60 × 66,740.80 - Step 4: Simplify right side
129,156.16x = 12,902,171,278.08 - Step 5: Solve for x
x = 12,902,171,278.08/129,156.16 - Step 6: Final answer
x = 99,895.90
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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.