Finding the Fourth Proportional to 85,452,398.97, 128,178,600.05 and 20,755,768.08
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Solution
The fourth proportional to 85,452,398.97, 128,178,600.05 and 20,755,768.08 is: 31,133,652.51
Step by Step Solution
- Step 1: Write the proportion equation
85,452,398.97 : 128,178,600.05 = 20,755,768.08 : x - Step 2: Convert to fraction form
85,452,398.97/128,178,600.05 = 20,755,768.08/x - Step 3: Cross multiply
85,452,398.97x = 128,178,600.05 × 20,755,768.08 - Step 4: Simplify right side
85,452,398.97x = 2,660,445,295,456,876 - Step 5: Solve for x
x = 2,660,445,295,456,876/85,452,398.97 - Step 6: Final answer
x = 31,133,652.51
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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.