Finding the Fourth Proportional to 81,831.84, 122,150.36 and 70,219.68
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Solution
The fourth proportional to 81,831.84, 122,150.36 and 70,219.68 is: 104,816.89
Step by Step Solution
- Step 1: Write the proportion equation
81,831.84 : 122,150.36 = 70,219.68 : x - Step 2: Convert to fraction form
81,831.84/122,150.36 = 70,219.68/x - Step 3: Cross multiply
81,831.84x = 122,150.36 × 70,219.68 - Step 4: Simplify right side
81,831.84x = 8,577,359,191.08 - Step 5: Solve for x
x = 8,577,359,191.08/81,831.84 - Step 6: Final answer
x = 104,816.89
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.