Finding the Fourth Proportional to 81,170.13, 121,798.80 and 39,617.13
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Solution
The fourth proportional to 81,170.13, 121,798.80 and 39,617.13 is: 59,446.98
Step by Step Solution
- Step 1: Write the proportion equation
81,170.13 : 121,798.80 = 39,617.13 : x - Step 2: Convert to fraction form
81,170.13/121,798.80 = 39,617.13/x - Step 3: Cross multiply
81,170.13x = 121,798.80 × 39,617.13 - Step 4: Simplify right side
81,170.13x = 4,825,318,893.44 - Step 5: Solve for x
x = 4,825,318,893.44/81,170.13 - Step 6: Final answer
x = 59,446.98
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.