Finding the Fourth Proportional to 138,248,742.40, 207,373,113.60 and 123,468,121.60
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Solution
The fourth proportional to 138,248,742.40, 207,373,113.60 and 123,468,121.60 is: 185,202,182.40
Step by Step Solution
- Step 1: Write the proportion equation
138,248,742.40 : 207,373,113.60 = 123,468,121.60 : x - Step 2: Convert to fraction form
138,248,742.40/207,373,113.60 = 123,468,121.60/x - Step 3: Cross multiply
138,248,742.40x = 207,373,113.60 × 123,468,121.60 - Step 4: Simplify right side
138,248,742.40x = 25,603,968,806,535,412 - Step 5: Solve for x
x = 25,603,968,806,535,412/138,248,742.40 - Step 6: Final answer
x = 185,202,182.40
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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.