Finding the Fourth Proportional to 217,328.28, 299,894.94 and 121,831.80
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Solution
The fourth proportional to 217,328.28, 299,894.94 and 121,831.80 is: 168,117.74
Step by Step Solution
- Step 1: Write the proportion equation
217,328.28 : 299,894.94 = 121,831.80 : x - Step 2: Convert to fraction form
217,328.28/299,894.94 = 121,831.80/x - Step 3: Cross multiply
217,328.28x = 299,894.94 × 121,831.80 - Step 4: Simplify right side
217,328.28x = 36,536,740,351.09 - Step 5: Solve for x
x = 36,536,740,351.09/217,328.28 - Step 6: Final answer
x = 168,117.74
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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.