Finding the Fourth Proportional to 129,197.16, 178,276.05 and 74,758.68
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Solution
The fourth proportional to 129,197.16, 178,276.05 and 74,758.68 is: 103,157.70
Step by Step Solution
- Step 1: Write the proportion equation
129,197.16 : 178,276.05 = 74,758.68 : x - Step 2: Convert to fraction form
129,197.16/178,276.05 = 74,758.68/x - Step 3: Cross multiply
129,197.16x = 178,276.05 × 74,758.68 - Step 4: Simplify right side
129,197.16x = 13,327,682,173.61 - Step 5: Solve for x
x = 13,327,682,173.61/129,197.16 - Step 6: Final answer
x = 103,157.70
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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.