Finding the Fourth Proportional to 128,228.47, 192,170.76 and 99,799.75
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Solution
The fourth proportional to 128,228.47, 192,170.76 and 99,799.75 is: 149,565.80
Step by Step Solution
- Step 1: Write the proportion equation
128,228.47 : 192,170.76 = 99,799.75 : x - Step 2: Convert to fraction form
128,228.47/192,170.76 = 99,799.75/x - Step 3: Cross multiply
128,228.47x = 192,170.76 × 99,799.75 - Step 4: Simplify right side
128,228.47x = 19,178,593,671.27 - Step 5: Solve for x
x = 19,178,593,671.27/128,228.47 - Step 6: Final answer
x = 149,565.80
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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.