Finding the Fourth Proportional to 100,641.12, 138,888.26 and 55,320.99
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Solution
The fourth proportional to 100,641.12, 138,888.26 and 55,320.99 is: 76,344.90
Step by Step Solution
- Step 1: Write the proportion equation
100,641.12 : 138,888.26 = 55,320.99 : x - Step 2: Convert to fraction form
100,641.12/138,888.26 = 55,320.99/x - Step 3: Cross multiply
100,641.12x = 138,888.26 × 55,320.99 - Step 4: Simplify right side
100,641.12x = 7,683,436,042.58 - Step 5: Solve for x
x = 7,683,436,042.58/100,641.12 - Step 6: Final answer
x = 76,344.90
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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.