Finding the Fourth Proportional to 129,177.36, 178,264.80 and 72,588.96
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Solution
The fourth proportional to 129,177.36, 178,264.80 and 72,588.96 is: 100,172.79
Step by Step Solution
- Step 1: Write the proportion equation
129,177.36 : 178,264.80 = 72,588.96 : x - Step 2: Convert to fraction form
129,177.36/178,264.80 = 72,588.96/x - Step 3: Cross multiply
129,177.36x = 178,264.80 × 72,588.96 - Step 4: Simplify right side
129,177.36x = 12,940,056,436.61 - Step 5: Solve for x
x = 12,940,056,436.61/129,177.36 - Step 6: Final answer
x = 100,172.79
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1.5x scale
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.