Finding the Fourth Proportional to 138,868.20, 208,302.30 and 72,438.08
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Solution
The fourth proportional to 138,868.20, 208,302.30 and 72,438.08 is: 108,657.12
Step by Step Solution
- Step 1: Write the proportion equation
138,868.20 : 208,302.30 = 72,438.08 : x - Step 2: Convert to fraction form
138,868.20/208,302.30 = 72,438.08/x - Step 3: Cross multiply
138,868.20x = 208,302.30 × 72,438.08 - Step 4: Simplify right side
138,868.20x = 15,089,018,671.58 - Step 5: Solve for x
x = 15,089,018,671.58/138,868.20 - Step 6: Final answer
x = 108,657.12
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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.