Finding the Fourth Proportional to 85,645.36, 128,476.68 and 29,478.08
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Solution
The fourth proportional to 85,645.36, 128,476.68 and 29,478.08 is: 44,220.09
Step by Step Solution
- Step 1: Write the proportion equation
85,645.36 : 128,476.68 = 29,478.08 : x - Step 2: Convert to fraction form
85,645.36/128,476.68 = 29,478.08/x - Step 3: Cross multiply
85,645.36x = 128,476.68 × 29,478.08 - Step 4: Simplify right side
85,645.36x = 3,787,245,061.40 - Step 5: Solve for x
x = 3,787,245,061.40/85,645.36 - Step 6: Final answer
x = 44,220.09
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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.