Finding the Fourth Proportional to 171,689.80, 257,534.70 and 76,919.80
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Solution
The fourth proportional to 171,689.80, 257,534.70 and 76,919.80 is: 115,379.70
Step by Step Solution
- Step 1: Write the proportion equation
171,689.80 : 257,534.70 = 76,919.80 : x - Step 2: Convert to fraction form
171,689.80/257,534.70 = 76,919.80/x - Step 3: Cross multiply
171,689.80x = 257,534.70 × 76,919.80 - Step 4: Simplify right side
171,689.80x = 19,809,517,617.06 - Step 5: Solve for x
x = 19,809,517,617.06/171,689.80 - Step 6: Final answer
x = 115,379.70
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1.5x scale
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.