Finding the Fourth Proportional to 100,648.17, 138,894.84 and 55,330.08
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Solution
The fourth proportional to 100,648.17, 138,894.84 and 55,330.08 is: 76,355.71
Step by Step Solution
- Step 1: Write the proportion equation
100,648.17 : 138,894.84 = 55,330.08 : x - Step 2: Convert to fraction form
100,648.17/138,894.84 = 55,330.08/x - Step 3: Cross multiply
100,648.17x = 138,894.84 × 55,330.08 - Step 4: Simplify right side
100,648.17x = 7,685,062,608.79 - Step 5: Solve for x
x = 7,685,062,608.79/100,648.17 - Step 6: Final answer
x = 76,355.71
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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.