Finding the Fourth Proportional to 85,589.28, 128,394.88 and 26,430.96
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Solution
The fourth proportional to 85,589.28, 128,394.88 and 26,430.96 is: 39,649.82
Step by Step Solution
- Step 1: Write the proportion equation
85,589.28 : 128,394.88 = 26,430.96 : x - Step 2: Convert to fraction form
85,589.28/128,394.88 = 26,430.96/x - Step 3: Cross multiply
85,589.28x = 128,394.88 × 26,430.96 - Step 4: Simplify right side
85,589.28x = 3,393,599,937.48 - Step 5: Solve for x
x = 3,393,599,937.48/85,589.28 - Step 6: Final answer
x = 39,649.82
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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.