Finding the Fourth Proportional to 85,906.12, 128,828.28 and 29,730.98
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Solution
The fourth proportional to 85,906.12, 128,828.28 and 29,730.98 is: 44,585.78
Step by Step Solution
- Step 1: Write the proportion equation
85,906.12 : 128,828.28 = 29,730.98 : x - Step 2: Convert to fraction form
85,906.12/128,828.28 = 29,730.98/x - Step 3: Cross multiply
85,906.12x = 128,828.28 × 29,730.98 - Step 4: Simplify right side
85,906.12x = 3,830,191,016.11 - Step 5: Solve for x
x = 3,830,191,016.11/85,906.12 - Step 6: Final answer
x = 44,585.78
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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.