Finding the Fourth Proportional to 138,247.23, 207,038.70 and 78,902.99
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Solution
The fourth proportional to 138,247.23, 207,038.70 and 78,902.99 is: 118,164.91
Step by Step Solution
- Step 1: Write the proportion equation
138,247.23 : 207,038.70 = 78,902.99 : x - Step 2: Convert to fraction form
138,247.23/207,038.70 = 78,902.99/x - Step 3: Cross multiply
138,247.23x = 207,038.70 × 78,902.99 - Step 4: Simplify right side
138,247.23x = 16,335,971,440.52 - Step 5: Solve for x
x = 16,335,971,440.52/138,247.23 - Step 6: Final answer
x = 118,164.91
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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.