Finding the Fourth Proportional to 128,430.20, 192,645.30 and 93,000.80
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Solution
The fourth proportional to 128,430.20, 192,645.30 and 93,000.80 is: 139,501.20
Step by Step Solution
- Step 1: Write the proportion equation
128,430.20 : 192,645.30 = 93,000.80 : x - Step 2: Convert to fraction form
128,430.20/192,645.30 = 93,000.80/x - Step 3: Cross multiply
128,430.20x = 192,645.30 × 93,000.80 - Step 4: Simplify right side
128,430.20x = 17,916,167,016.24 - Step 5: Solve for x
x = 17,916,167,016.24/128,430.20 - Step 6: Final answer
x = 139,501.20
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Double scale
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Similar ratio
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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.