Finding the Fourth Proportional to 81,124.61, 121,686.84 and 30,533.09
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Solution
The fourth proportional to 81,124.61, 121,686.84 and 30,533.09 is: 45,799.60
Step by Step Solution
- Step 1: Write the proportion equation
81,124.61 : 121,686.84 = 30,533.09 : x - Step 2: Convert to fraction form
81,124.61/121,686.84 = 30,533.09/x - Step 3: Cross multiply
81,124.61x = 121,686.84 × 30,533.09 - Step 4: Simplify right side
81,124.61x = 3,715,474,629.10 - Step 5: Solve for x
x = 3,715,474,629.10/81,124.61 - Step 6: Final answer
x = 45,799.60
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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.