Finding the Fourth Proportional to 81,251.15, 121,864.36 and 31,323.96
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Solution
The fourth proportional to 81,251.15, 121,864.36 and 31,323.96 is: 46,981.17
Step by Step Solution
- Step 1: Write the proportion equation
81,251.15 : 121,864.36 = 31,323.96 : x - Step 2: Convert to fraction form
81,251.15/121,864.36 = 31,323.96/x - Step 3: Cross multiply
81,251.15x = 121,864.36 × 31,323.96 - Step 4: Simplify right side
81,251.15x = 3,817,274,338.07 - Step 5: Solve for x
x = 3,817,274,338.07/81,251.15 - Step 6: Final answer
x = 46,981.17
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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.