Finding the Fourth Proportional to 85,644.09, 128,466.99 and 38,261.52
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Solution
The fourth proportional to 85,644.09, 128,466.99 and 38,261.52 is: 57,392.66
Step by Step Solution
- Step 1: Write the proportion equation
85,644.09 : 128,466.99 = 38,261.52 : x - Step 2: Convert to fraction form
85,644.09/128,466.99 = 38,261.52/x - Step 3: Cross multiply
85,644.09x = 128,466.99 × 38,261.52 - Step 4: Simplify right side
85,644.09x = 4,915,342,307.22 - Step 5: Solve for x
x = 4,915,342,307.22/85,644.09 - Step 6: Final answer
x = 57,392.66
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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.