Finding the Fourth Proportional to 81,251.35, 121,905.89 and 36,268.63
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Solution
The fourth proportional to 81,251.35, 121,905.89 and 36,268.63 is: 54,415.83
Step by Step Solution
- Step 1: Write the proportion equation
81,251.35 : 121,905.89 = 36,268.63 : x - Step 2: Convert to fraction form
81,251.35/121,905.89 = 36,268.63/x - Step 3: Cross multiply
81,251.35x = 121,905.89 × 36,268.63 - Step 4: Simplify right side
81,251.35x = 4,421,359,269.13 - Step 5: Solve for x
x = 4,421,359,269.13/81,251.35 - Step 6: Final answer
x = 54,415.83
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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.