Finding the Fourth Proportional to 81,263.36, 121,545.12 and 72,320.96
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Solution
The fourth proportional to 81,263.36, 121,545.12 and 72,320.96 is: 108,170.03
Step by Step Solution
- Step 1: Write the proportion equation
81,263.36 : 121,545.12 = 72,320.96 : x - Step 2: Convert to fraction form
81,263.36/121,545.12 = 72,320.96/x - Step 3: Cross multiply
81,263.36x = 121,545.12 × 72,320.96 - Step 4: Simplify right side
81,263.36x = 8,790,259,761.72 - Step 5: Solve for x
x = 8,790,259,761.72/81,263.36 - Step 6: Final answer
x = 108,170.03
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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.