Finding the Fourth Proportional to 102,431.79, 141,423.72 and 66,149.46
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Solution
The fourth proportional to 102,431.79, 141,423.72 and 66,149.46 is: 91,330.07
Step by Step Solution
- Step 1: Write the proportion equation
102,431.79 : 141,423.72 = 66,149.46 : x - Step 2: Convert to fraction form
102,431.79/141,423.72 = 66,149.46/x - Step 3: Cross multiply
102,431.79x = 141,423.72 × 66,149.46 - Step 4: Simplify right side
102,431.79x = 9,355,102,833.22 - Step 5: Solve for x
x = 9,355,102,833.22/102,431.79 - Step 6: Final answer
x = 91,330.07
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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.