Finding the Fourth Proportional to 138,215.70, 207,323.55 and 68,231.70
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Solution
The fourth proportional to 138,215.70, 207,323.55 and 68,231.70 is: 102,347.55
Step by Step Solution
- Step 1: Write the proportion equation
138,215.70 : 207,323.55 = 68,231.70 : x - Step 2: Convert to fraction form
138,215.70/207,323.55 = 68,231.70/x - Step 3: Cross multiply
138,215.70x = 207,323.55 × 68,231.70 - Step 4: Simplify right side
138,215.70x = 14,146,038,266.54 - Step 5: Solve for x
x = 14,146,038,266.54/138,215.70 - Step 6: Final answer
x = 102,347.55
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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.