Finding the Fourth Proportional to 126,687.42, 174,831.84 and 76,389.66
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Solution
The fourth proportional to 126,687.42, 174,831.84 and 76,389.66 is: 105,419.66
Step by Step Solution
- Step 1: Write the proportion equation
126,687.42 : 174,831.84 = 76,389.66 : x - Step 2: Convert to fraction form
126,687.42/174,831.84 = 76,389.66/x - Step 3: Cross multiply
126,687.42x = 174,831.84 × 76,389.66 - Step 4: Simplify right side
126,687.42x = 13,355,344,814.77 - Step 5: Solve for x
x = 13,355,344,814.77/126,687.42 - Step 6: Final answer
x = 105,419.66
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.