Finding the Fourth Proportional to 128,742,135.20, 193,337,151.60 and 68,275,959.20
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Solution
The fourth proportional to 128,742,135.20, 193,337,151.60 and 68,275,959.20 is: 102,532,705.82
Step by Step Solution
- Step 1: Write the proportion equation
128,742,135.20 : 193,337,151.60 = 68,275,959.20 : x - Step 2: Convert to fraction form
128,742,135.20/193,337,151.60 = 68,275,959.20/x - Step 3: Cross multiply
128,742,135.20x = 193,337,151.60 × 68,275,959.20 - Step 4: Simplify right side
128,742,135.20x = 13,200,279,474,485,814 - Step 5: Solve for x
x = 13,200,279,474,485,814/128,742,135.20 - Step 6: Final answer
x = 102,532,705.82
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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.