Finding the Fourth Proportional to 128,023.80, 192,035.70 and 72,727.80
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Solution
The fourth proportional to 128,023.80, 192,035.70 and 72,727.80 is: 109,091.70
Step by Step Solution
- Step 1: Write the proportion equation
128,023.80 : 192,035.70 = 72,727.80 : x - Step 2: Convert to fraction form
128,023.80/192,035.70 = 72,727.80/x - Step 3: Cross multiply
128,023.80x = 192,035.70 × 72,727.80 - Step 4: Simplify right side
128,023.80x = 13,966,333,982.46 - Step 5: Solve for x
x = 13,966,333,982.46/128,023.80 - Step 6: Final answer
x = 109,091.70
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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.