Finding the Fourth Proportional to 102,078.63, 140,834.79 and 61,777.08
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Solution
The fourth proportional to 102,078.63, 140,834.79 and 61,777.08 is: 85,231.96
Step by Step Solution
- Step 1: Write the proportion equation
102,078.63 : 140,834.79 = 61,777.08 : x - Step 2: Convert to fraction form
102,078.63/140,834.79 = 61,777.08/x - Step 3: Cross multiply
102,078.63x = 140,834.79 × 61,777.08 - Step 4: Simplify right side
102,078.63x = 8,700,362,088.61 - Step 5: Solve for x
x = 8,700,362,088.61/102,078.63 - Step 6: Final answer
x = 85,231.96
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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.