Finding the Fourth Proportional to 100,370.17, 138,163.13 and 86,751.95
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Solution
The fourth proportional to 100,370.17, 138,163.13 and 86,751.95 is: 119,417.17
Step by Step Solution
- Step 1: Write the proportion equation
100,370.17 : 138,163.13 = 86,751.95 : x - Step 2: Convert to fraction form
100,370.17/138,163.13 = 86,751.95/x - Step 3: Cross multiply
100,370.17x = 138,163.13 × 86,751.95 - Step 4: Simplify right side
100,370.17x = 11,985,920,945.60 - Step 5: Solve for x
x = 11,985,920,945.60/100,370.17 - Step 6: Final answer
x = 119,417.17
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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.