Finding the Fourth Proportional to 81,274.05, 121,831.11 and 47,497.20
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Solution
The fourth proportional to 81,274.05, 121,831.11 and 47,497.20 is: 71,199.07
Step by Step Solution
- Step 1: Write the proportion equation
81,274.05 : 121,831.11 = 47,497.20 : x - Step 2: Convert to fraction form
81,274.05/121,831.11 = 47,497.20/x - Step 3: Cross multiply
81,274.05x = 121,831.11 × 47,497.20 - Step 4: Simplify right side
81,274.05x = 5,786,636,597.89 - Step 5: Solve for x
x = 5,786,636,597.89/81,274.05 - Step 6: Final answer
x = 71,199.07
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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.