Finding the Fourth Proportional to 100,671.09, 138,926.16 and 55,349.84
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Solution
The fourth proportional to 100,671.09, 138,926.16 and 55,349.84 is: 76,382.81
Step by Step Solution
- Step 1: Write the proportion equation
100,671.09 : 138,926.16 = 55,349.84 : x - Step 2: Convert to fraction form
100,671.09/138,926.16 = 55,349.84/x - Step 3: Cross multiply
100,671.09x = 138,926.16 × 55,349.84 - Step 4: Simplify right side
100,671.09x = 7,689,540,840.07 - Step 5: Solve for x
x = 7,689,540,840.07/100,671.09 - Step 6: Final answer
x = 76,382.81
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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.