Finding the Fourth Proportional to 99,678,879.60, 149,518,319.40 and 70,768,489.20
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Solution
The fourth proportional to 99,678,879.60, 149,518,319.40 and 70,768,489.20 is: 106,152,733.80
Step by Step Solution
- Step 1: Write the proportion equation
99,678,879.60 : 149,518,319.40 = 70,768,489.20 : x - Step 2: Convert to fraction form
99,678,879.60/149,518,319.40 = 70,768,489.20/x - Step 3: Cross multiply
99,678,879.60x = 149,518,319.40 × 70,768,489.20 - Step 4: Simplify right side
99,678,879.60x = 10,581,185,571,661,052 - Step 5: Solve for x
x = 10,581,185,571,661,052/99,678,879.60 - Step 6: Final answer
x = 106,152,733.80
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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.