Finding the Fourth Proportional to 129,195.16, 178,273.29 and 74,756.68
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Solution
The fourth proportional to 129,195.16, 178,273.29 and 74,756.68 is: 103,154.94
Step by Step Solution
- Step 1: Write the proportion equation
129,195.16 : 178,273.29 = 74,756.68 : x - Step 2: Convert to fraction form
129,195.16/178,273.29 = 74,756.68/x - Step 3: Cross multiply
129,195.16x = 178,273.29 × 74,756.68 - Step 4: Simplify right side
129,195.16x = 13,327,119,293.08 - Step 5: Solve for x
x = 13,327,119,293.08/129,195.16 - Step 6: Final answer
x = 103,154.94
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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.