Finding the Fourth Proportional to 128,465.80, 192,698.70 and 66,257.80
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Solution
The fourth proportional to 128,465.80, 192,698.70 and 66,257.80 is: 99,386.70
Step by Step Solution
- Step 1: Write the proportion equation
128,465.80 : 192,698.70 = 66,257.80 : x - Step 2: Convert to fraction form
128,465.80/192,698.70 = 66,257.80/x - Step 3: Cross multiply
128,465.80x = 192,698.70 × 66,257.80 - Step 4: Simplify right side
128,465.80x = 12,767,791,924.86 - Step 5: Solve for x
x = 12,767,791,924.86/128,465.80 - Step 6: Final answer
x = 99,386.70
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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.