Finding the Fourth Proportional to 153,749.32, 212,174.28 and 85,770.68
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Solution
The fourth proportional to 153,749.32, 212,174.28 and 85,770.68 is: 118,363.66
Step by Step Solution
- Step 1: Write the proportion equation
153,749.32 : 212,174.28 = 85,770.68 : x - Step 2: Convert to fraction form
153,749.32/212,174.28 = 85,770.68/x - Step 3: Cross multiply
153,749.32x = 212,174.28 × 85,770.68 - Step 4: Simplify right side
153,749.32x = 18,198,332,274.11 - Step 5: Solve for x
x = 18,198,332,274.11/153,749.32 - Step 6: Final answer
x = 118,363.66
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1.5x scale
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.