Finding the Fourth Proportional to 102,711.79, 141,739.62 and 57,390.14
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Solution
The fourth proportional to 102,711.79, 141,739.62 and 57,390.14 is: 79,196.92
Step by Step Solution
- Step 1: Write the proportion equation
102,711.79 : 141,739.62 = 57,390.14 : x - Step 2: Convert to fraction form
102,711.79/141,739.62 = 57,390.14/x - Step 3: Cross multiply
102,711.79x = 141,739.62 × 57,390.14 - Step 4: Simplify right side
102,711.79x = 8,134,457,166.87 - Step 5: Solve for x
x = 8,134,457,166.87/102,711.79 - Step 6: Final answer
x = 79,196.92
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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.