Finding the Fourth Proportional to 212,448.77, 318,513.97 and 128,189.03
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Solution
The fourth proportional to 212,448.77, 318,513.97 and 128,189.03 is: 192,187.49
Step by Step Solution
- Step 1: Write the proportion equation
212,448.77 : 318,513.97 = 128,189.03 : x - Step 2: Convert to fraction form
212,448.77/318,513.97 = 128,189.03/x - Step 3: Cross multiply
212,448.77x = 318,513.97 × 128,189.03 - Step 4: Simplify right side
212,448.77x = 40,829,997,215.06 - Step 5: Solve for x
x = 40,829,997,215.06/212,448.77 - Step 6: Final answer
x = 192,187.49
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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.