Finding the Fourth Proportional to 103,971.20, 155,204.71 and 91,359.90
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Solution
The fourth proportional to 103,971.20, 155,204.71 and 91,359.90 is: 136,378.99
Step by Step Solution
- Step 1: Write the proportion equation
103,971.20 : 155,204.71 = 91,359.90 : x - Step 2: Convert to fraction form
103,971.20/155,204.71 = 91,359.90/x - Step 3: Cross multiply
103,971.20x = 155,204.71 × 91,359.90 - Step 4: Simplify right side
103,971.20x = 14,179,486,556.73 - Step 5: Solve for x
x = 14,179,486,556.73/103,971.20 - Step 6: Final answer
x = 136,378.99
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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.