Finding the Fourth Proportional to 85,415,206.40, 128,122,809.60 and 71,054,489.60
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Solution
The fourth proportional to 85,415,206.40, 128,122,809.60 and 71,054,489.60 is: 106,581,734.40
Step by Step Solution
- Step 1: Write the proportion equation
85,415,206.40 : 128,122,809.60 = 71,054,489.60 : x - Step 2: Convert to fraction form
85,415,206.40/128,122,809.60 = 71,054,489.60/x - Step 3: Cross multiply
85,415,206.40x = 128,122,809.60 × 71,054,489.60 - Step 4: Simplify right side
85,415,206.40x = 9,103,700,842,245,978 - Step 5: Solve for x
x = 9,103,700,842,245,978/85,415,206.40 - Step 6: Final answer
x = 106,581,734.40
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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.