Finding the Fourth Proportional to 100,542.17, 138,749.75 and 55,221.99
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Solution
The fourth proportional to 100,542.17, 138,749.75 and 55,221.99 is: 76,207.20
Step by Step Solution
- Step 1: Write the proportion equation
100,542.17 : 138,749.75 = 55,221.99 : x - Step 2: Convert to fraction form
100,542.17/138,749.75 = 55,221.99/x - Step 3: Cross multiply
100,542.17x = 138,749.75 × 55,221.99 - Step 4: Simplify right side
100,542.17x = 7,662,037,237.98 - Step 5: Solve for x
x = 7,662,037,237.98/100,542.17 - Step 6: Final answer
x = 76,207.20
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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.