Finding the Fourth Proportional to 81,332.20, 121,998.30 and 68,501.80
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Solution
The fourth proportional to 81,332.20, 121,998.30 and 68,501.80 is: 102,752.70
Step by Step Solution
- Step 1: Write the proportion equation
81,332.20 : 121,998.30 = 68,501.80 : x - Step 2: Convert to fraction form
81,332.20/121,998.30 = 68,501.80/x - Step 3: Cross multiply
81,332.20x = 121,998.30 × 68,501.80 - Step 4: Simplify right side
81,332.20x = 8,357,103,146.94 - Step 5: Solve for x
x = 8,357,103,146.94/81,332.20 - Step 6: Final answer
x = 102,752.70
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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.