Finding the Fourth Proportional to 128,480.20, 192,720.30 and 34,985.80
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Solution
The fourth proportional to 128,480.20, 192,720.30 and 34,985.80 is: 52,478.70
Step by Step Solution
- Step 1: Write the proportion equation
128,480.20 : 192,720.30 = 34,985.80 : x - Step 2: Convert to fraction form
128,480.20/192,720.30 = 34,985.80/x - Step 3: Cross multiply
128,480.20x = 192,720.30 × 34,985.80 - Step 4: Simplify right side
128,480.20x = 6,742,473,871.74 - Step 5: Solve for x
x = 6,742,473,871.74/128,480.20 - Step 6: Final answer
x = 52,478.70
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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.