Finding the Fourth Proportional to 128,831.10, 193,246.65 and 54,035.70
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Solution
The fourth proportional to 128,831.10, 193,246.65 and 54,035.70 is: 81,053.55
Step by Step Solution
- Step 1: Write the proportion equation
128,831.10 : 193,246.65 = 54,035.70 : x - Step 2: Convert to fraction form
128,831.10/193,246.65 = 54,035.70/x - Step 3: Cross multiply
128,831.10x = 193,246.65 × 54,035.70 - Step 4: Simplify right side
128,831.10x = 10,442,218,005.41 - Step 5: Solve for x
x = 10,442,218,005.41/128,831.10 - Step 6: Final answer
x = 81,053.55
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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.