Finding the Fourth Proportional to 128,421.60, 192,574.80 and 58,264.80
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Solution
The fourth proportional to 128,421.60, 192,574.80 and 58,264.80 is: 87,371.07
Step by Step Solution
- Step 1: Write the proportion equation
128,421.60 : 192,574.80 = 58,264.80 : x - Step 2: Convert to fraction form
128,421.60/192,574.80 = 58,264.80/x - Step 3: Cross multiply
128,421.60x = 192,574.80 × 58,264.80 - Step 4: Simplify right side
128,421.60x = 11,220,332,207.04 - Step 5: Solve for x
x = 11,220,332,207.04/128,421.60 - Step 6: Final answer
x = 87,371.07
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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.