Finding the Fourth Proportional to 128,742,027.20, 193,336,989.60 and 68,275,851.20
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Solution
The fourth proportional to 128,742,027.20, 193,336,989.60 and 68,275,851.20 is: 102,532,543.73
Step by Step Solution
- Step 1: Write the proportion equation
128,742,027.20 : 193,336,989.60 = 68,275,851.20 : x - Step 2: Convert to fraction form
128,742,027.20/193,336,989.60 = 68,275,851.20/x - Step 3: Cross multiply
128,742,027.20x = 193,336,989.60 × 68,275,851.20 - Step 4: Simplify right side
128,742,027.20x = 13,200,247,533,385,548 - Step 5: Solve for x
x = 13,200,247,533,385,548/128,742,027.20 - Step 6: Final answer
x = 102,532,543.73
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.