Finding the Fourth Proportional to 91,137.68, 136,707.52 and 31,974.80
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Solution
The fourth proportional to 91,137.68, 136,707.52 and 31,974.80 is: 47,962.55
Step by Step Solution
- Step 1: Write the proportion equation
91,137.68 : 136,707.52 = 31,974.80 : x - Step 2: Convert to fraction form
91,137.68/136,707.52 = 31,974.80/x - Step 3: Cross multiply
91,137.68x = 136,707.52 × 31,974.80 - Step 4: Simplify right side
91,137.68x = 4,371,195,610.50 - Step 5: Solve for x
x = 4,371,195,610.50/91,137.68 - Step 6: Final answer
x = 47,962.55
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.