Finding the Fourth Proportional to 128,025.80, 192,038.70 and 72,729.80
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Solution
The fourth proportional to 128,025.80, 192,038.70 and 72,729.80 is: 109,094.70
Step by Step Solution
- Step 1: Write the proportion equation
128,025.80 : 192,038.70 = 72,729.80 : x - Step 2: Convert to fraction form
128,025.80/192,038.70 = 72,729.80/x - Step 3: Cross multiply
128,025.80x = 192,038.70 × 72,729.80 - Step 4: Simplify right side
128,025.80x = 13,966,936,243.26 - Step 5: Solve for x
x = 13,966,936,243.26/128,025.80 - Step 6: Final answer
x = 109,094.70
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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.