Finding the Fourth Proportional to 212,220.05, 318,420.11 and 99,897.79
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Solution
The fourth proportional to 212,220.05, 318,420.11 and 99,897.79 is: 149,889.06
Step by Step Solution
- Step 1: Write the proportion equation
212,220.05 : 318,420.11 = 99,897.79 : x - Step 2: Convert to fraction form
212,220.05/318,420.11 = 99,897.79/x - Step 3: Cross multiply
212,220.05x = 318,420.11 × 99,897.79 - Step 4: Simplify right side
212,220.05x = 31,809,463,985.02 - Step 5: Solve for x
x = 31,809,463,985.02/212,220.05 - Step 6: Final answer
x = 149,889.06
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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.