Finding the Fourth Proportional to 103,953.41, 155,178.14 and 91,342.09
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Solution
The fourth proportional to 103,953.41, 155,178.14 and 91,342.09 is: 136,352.39
Step by Step Solution
- Step 1: Write the proportion equation
103,953.41 : 155,178.14 = 91,342.09 : x - Step 2: Convert to fraction form
103,953.41/155,178.14 = 91,342.09/x - Step 3: Cross multiply
103,953.41x = 155,178.14 × 91,342.09 - Step 4: Simplify right side
103,953.41x = 14,174,295,629.91 - Step 5: Solve for x
x = 14,174,295,629.91/103,953.41 - Step 6: Final answer
x = 136,352.39
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.