Finding the Fourth Proportional to 100,272.71, 138,374.12 and 54,949.70
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Solution
The fourth proportional to 100,272.71, 138,374.12 and 54,949.70 is: 75,829.37
Step by Step Solution
- Step 1: Write the proportion equation
100,272.71 : 138,374.12 = 54,949.70 : x - Step 2: Convert to fraction form
100,272.71/138,374.12 = 54,949.70/x - Step 3: Cross multiply
100,272.71x = 138,374.12 × 54,949.70 - Step 4: Simplify right side
100,272.71x = 7,603,616,865.07 - Step 5: Solve for x
x = 7,603,616,865.07/100,272.71 - Step 6: Final answer
x = 75,829.37
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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.