Finding the Fourth Proportional to 85,515.12, 128,291.61 and 29,353.97
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Solution
The fourth proportional to 85,515.12, 128,291.61 and 29,353.97 is: 44,037.45
Step by Step Solution
- Step 1: Write the proportion equation
85,515.12 : 128,291.61 = 29,353.97 : x - Step 2: Convert to fraction form
85,515.12/128,291.61 = 29,353.97/x - Step 3: Cross multiply
85,515.12x = 128,291.61 × 29,353.97 - Step 4: Simplify right side
85,515.12x = 3,765,868,071.19 - Step 5: Solve for x
x = 3,765,868,071.19/85,515.12 - Step 6: Final answer
x = 44,037.45
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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.