Finding the Fourth Proportional to 139,023,007.80, 208,534,511.70 and 132,645,715.80
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Solution
The fourth proportional to 139,023,007.80, 208,534,511.70 and 132,645,715.80 is: 198,968,573.70
Step by Step Solution
- Step 1: Write the proportion equation
139,023,007.80 : 208,534,511.70 = 132,645,715.80 : x - Step 2: Convert to fraction form
139,023,007.80/208,534,511.70 = 132,645,715.80/x - Step 3: Cross multiply
139,023,007.80x = 208,534,511.70 × 132,645,715.80 - Step 4: Simplify right side
139,023,007.80x = 27,661,209,573,449,972 - Step 5: Solve for x
x = 27,661,209,573,449,972/139,023,007.80 - Step 6: Final answer
x = 198,968,573.70
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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.