Finding the Fourth Proportional to 129,196.16, 178,274.67 and 74,757.68
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Solution
The fourth proportional to 129,196.16, 178,274.67 and 74,757.68 is: 103,156.32
Step by Step Solution
- Step 1: Write the proportion equation
129,196.16 : 178,274.67 = 74,757.68 : x - Step 2: Convert to fraction form
129,196.16/178,274.67 = 74,757.68/x - Step 3: Cross multiply
129,196.16x = 178,274.67 × 74,757.68 - Step 4: Simplify right side
129,196.16x = 13,327,400,731.97 - Step 5: Solve for x
x = 13,327,400,731.97/129,196.16 - Step 6: Final answer
x = 103,156.32
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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.