Finding the Fourth Proportional to 81,688,645.80, 122,532,968.70 and 51,455,557.80
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Solution
The fourth proportional to 81,688,645.80, 122,532,968.70 and 51,455,557.80 is: 77,183,336.70
Step by Step Solution
- Step 1: Write the proportion equation
81,688,645.80 : 122,532,968.70 = 51,455,557.80 : x - Step 2: Convert to fraction form
81,688,645.80/122,532,968.70 = 51,455,557.80/x - Step 3: Cross multiply
81,688,645.80x = 122,532,968.70 × 51,455,557.80 - Step 4: Simplify right side
81,688,645.80x = 6,305,002,253,348,441 - Step 5: Solve for x
x = 6,305,002,253,348,441/81,688,645.80 - Step 6: Final answer
x = 77,183,336.70
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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.