Finding the Fourth Proportional to 128,831.44, 177,789.22 and 77,837.08
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Solution
The fourth proportional to 128,831.44, 177,789.22 and 77,837.08 is: 107,416.28
Step by Step Solution
- Step 1: Write the proportion equation
128,831.44 : 177,789.22 = 77,837.08 : x - Step 2: Convert to fraction form
128,831.44/177,789.22 = 77,837.08/x - Step 3: Cross multiply
128,831.44x = 177,789.22 × 77,837.08 - Step 4: Simplify right side
128,831.44x = 13,838,593,740.28 - Step 5: Solve for x
x = 13,838,593,740.28/128,831.44 - Step 6: Final answer
x = 107,416.28
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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.