Finding the Fourth Proportional to 85,810,220.80, 128,715,331.20 and 78,755,833.60
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Solution
The fourth proportional to 85,810,220.80, 128,715,331.20 and 78,755,833.60 is: 118,133,750.40
Step by Step Solution
- Step 1: Write the proportion equation
85,810,220.80 : 128,715,331.20 = 78,755,833.60 : x - Step 2: Convert to fraction form
85,810,220.80/128,715,331.20 = 78,755,833.60/x - Step 3: Cross multiply
85,810,220.80x = 128,715,331.20 × 78,755,833.60 - Step 4: Simplify right side
85,810,220.80x = 10,137,083,205,756,088 - Step 5: Solve for x
x = 10,137,083,205,756,088/85,810,220.80 - Step 6: Final answer
x = 118,133,750.40
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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.