Finding the Fourth Proportional to 78,639,768.40, 117,959,652.60 and 44,202,391.60
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Solution
The fourth proportional to 78,639,768.40, 117,959,652.60 and 44,202,391.60 is: 66,303,587.40
Step by Step Solution
- Step 1: Write the proportion equation
78,639,768.40 : 117,959,652.60 = 44,202,391.60 : x - Step 2: Convert to fraction form
78,639,768.40/117,959,652.60 = 44,202,391.60/x - Step 3: Cross multiply
78,639,768.40x = 117,959,652.60 × 44,202,391.60 - Step 4: Simplify right side
78,639,768.40x = 5,214,098,757,225,158 - Step 5: Solve for x
x = 5,214,098,757,225,158/78,639,768.40 - Step 6: Final answer
x = 66,303,587.40
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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.