Finding the Fourth Proportional to 128,720,339.70, 193,080,509.55 and 128,720,339.70
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Solution
The fourth proportional to 128,720,339.70, 193,080,509.55 and 128,720,339.70 is: 193,080,509.55
Step by Step Solution
- Step 1: Write the proportion equation
128,720,339.70 : 193,080,509.55 = 128,720,339.70 : x - Step 2: Convert to fraction form
128,720,339.70/193,080,509.55 = 128,720,339.70/x - Step 3: Cross multiply
128,720,339.70x = 193,080,509.55 × 128,720,339.70 - Step 4: Simplify right side
128,720,339.70x = 24,853,388,778,725,096 - Step 5: Solve for x
x = 24,853,388,778,725,096/128,720,339.70 - Step 6: Final answer
x = 193,080,509.55
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1.5x scale
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.