Finding the Fourth Proportional to 115,157,431.08, 172,764,485.82 and 81,145,207.08
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Solution
The fourth proportional to 115,157,431.08, 172,764,485.82 and 81,145,207.08 is: 121,737,779.72
Step by Step Solution
- Step 1: Write the proportion equation
115,157,431.08 : 172,764,485.82 = 81,145,207.08 : x - Step 2: Convert to fraction form
115,157,431.08/172,764,485.82 = 81,145,207.08/x - Step 3: Cross multiply
115,157,431.08x = 172,764,485.82 × 81,145,207.08 - Step 4: Simplify right side
115,157,431.08x = 14,019,009,977,933,622 - Step 5: Solve for x
x = 14,019,009,977,933,622/115,157,431.08 - Step 6: Final answer
x = 121,737,779.72
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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.