Finding the Fourth Proportional to 128,756,114.40, 193,134,171.60 and 68,289,938.40
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Solution
The fourth proportional to 128,756,114.40, 193,134,171.60 and 68,289,938.40 is: 102,434,907.60
Step by Step Solution
- Step 1: Write the proportion equation
128,756,114.40 : 193,134,171.60 = 68,289,938.40 : x - Step 2: Convert to fraction form
128,756,114.40/193,134,171.60 = 68,289,938.40/x - Step 3: Cross multiply
128,756,114.40x = 193,134,171.60 × 68,289,938.40 - Step 4: Simplify right side
128,756,114.40x = 13,189,120,681,499,030 - Step 5: Solve for x
x = 13,189,120,681,499,030/128,756,114.40 - Step 6: Final answer
x = 102,434,907.60
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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.