Finding the Fourth Proportional to 138,263.49, 207,399.20 and 38,430.99
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Solution
The fourth proportional to 138,263.49, 207,399.20 and 38,430.99 is: 57,647.59
Step by Step Solution
- Step 1: Write the proportion equation
138,263.49 : 207,399.20 = 38,430.99 : x - Step 2: Convert to fraction form
138,263.49/207,399.20 = 38,430.99/x - Step 3: Cross multiply
138,263.49x = 207,399.20 × 38,430.99 - Step 4: Simplify right side
138,263.49x = 7,970,556,389.05 - Step 5: Solve for x
x = 7,970,556,389.05/138,263.49 - Step 6: Final answer
x = 57,647.59
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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.