Finding the Fourth Proportional to 126,197,130.80, 189,165,059.40 and 68,567,639.60
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Solution
The fourth proportional to 126,197,130.80, 189,165,059.40 and 68,567,639.60 is: 102,780,479.52
Step by Step Solution
- Step 1: Write the proportion equation
126,197,130.80 : 189,165,059.40 = 68,567,639.60 : x - Step 2: Convert to fraction form
126,197,130.80/189,165,059.40 = 68,567,639.60/x - Step 3: Cross multiply
126,197,130.80x = 189,165,059.40 × 68,567,639.60 - Step 4: Simplify right side
126,197,130.80x = 12,970,601,617,851,792 - Step 5: Solve for x
x = 12,970,601,617,851,792/126,197,130.80 - Step 6: Final answer
x = 102,780,479.52
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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.