Finding the Fourth Proportional to 81,799.68, 122,701.08 and 25,638.56
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Solution
The fourth proportional to 81,799.68, 122,701.08 and 25,638.56 is: 38,458.33
Step by Step Solution
- Step 1: Write the proportion equation
81,799.68 : 122,701.08 = 25,638.56 : x - Step 2: Convert to fraction form
81,799.68/122,701.08 = 25,638.56/x - Step 3: Cross multiply
81,799.68x = 122,701.08 × 25,638.56 - Step 4: Simplify right side
81,799.68x = 3,145,878,944.41 - Step 5: Solve for x
x = 3,145,878,944.41/81,799.68 - Step 6: Final answer
x = 38,458.33
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1.5x scale
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.