Finding the Fourth Proportional to 78,358,435.20, 117,537,652.80 and 42,526,627.20
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Solution
The fourth proportional to 78,358,435.20, 117,537,652.80 and 42,526,627.20 is: 63,789,940.80
Step by Step Solution
- Step 1: Write the proportion equation
78,358,435.20 : 117,537,652.80 = 42,526,627.20 : x - Step 2: Convert to fraction form
78,358,435.20/117,537,652.80 = 42,526,627.20/x - Step 3: Cross multiply
78,358,435.20x = 117,537,652.80 × 42,526,627.20 - Step 4: Simplify right side
78,358,435.20x = 4,998,479,942,588,636 - Step 5: Solve for x
x = 4,998,479,942,588,636/78,358,435.20 - Step 6: Final answer
x = 63,789,940.80
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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.