Finding the Fourth Proportional to 100,437.05, 138,611.74 and 55,123.79
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Solution
The fourth proportional to 100,437.05, 138,611.74 and 55,123.79 is: 76,075.56
Step by Step Solution
- Step 1: Write the proportion equation
100,437.05 : 138,611.74 = 55,123.79 : x - Step 2: Convert to fraction form
100,437.05/138,611.74 = 55,123.79/x - Step 3: Cross multiply
100,437.05x = 138,611.74 × 55,123.79 - Step 4: Simplify right side
100,437.05x = 7,640,804,447.29 - Step 5: Solve for x
x = 7,640,804,447.29/100,437.05 - Step 6: Final answer
x = 76,075.56
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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.