Finding the Fourth Proportional to 81,322.79, 121,890.58 and 31,380.80
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Solution
The fourth proportional to 81,322.79, 121,890.58 and 31,380.80 is: 47,035.07
Step by Step Solution
- Step 1: Write the proportion equation
81,322.79 : 121,890.58 = 31,380.80 : x - Step 2: Convert to fraction form
81,322.79/121,890.58 = 31,380.80/x - Step 3: Cross multiply
81,322.79x = 121,890.58 × 31,380.80 - Step 4: Simplify right side
81,322.79x = 3,825,023,224.96 - Step 5: Solve for x
x = 3,825,023,224.96/81,322.79 - Step 6: Final answer
x = 47,035.07
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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.