Finding the Fourth Proportional to 221,128.81, 305,158.66 and 125,640.74
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Solution
The fourth proportional to 221,128.81, 305,158.66 and 125,640.74 is: 173,384.74
Step by Step Solution
- Step 1: Write the proportion equation
221,128.81 : 305,158.66 = 125,640.74 : x - Step 2: Convert to fraction form
221,128.81/305,158.66 = 125,640.74/x - Step 3: Cross multiply
221,128.81x = 305,158.66 × 125,640.74 - Step 4: Simplify right side
221,128.81x = 38,340,360,308.60 - Step 5: Solve for x
x = 38,340,360,308.60/221,128.81 - Step 6: Final answer
x = 173,384.74
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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.