Finding the Fourth Proportional to 100,820.97, 139,131.84 and 55,497.99
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Solution
The fourth proportional to 100,820.97, 139,131.84 and 55,497.99 is: 76,586.63
Step by Step Solution
- Step 1: Write the proportion equation
100,820.97 : 139,131.84 = 55,497.99 : x - Step 2: Convert to fraction form
100,820.97/139,131.84 = 55,497.99/x - Step 3: Cross multiply
100,820.97x = 139,131.84 × 55,497.99 - Step 4: Simplify right side
100,820.97x = 7,721,538,194.86 - Step 5: Solve for x
x = 7,721,538,194.86/100,820.97 - Step 6: Final answer
x = 76,586.63
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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.