Finding the Fourth Proportional to 133,139.67, 183,734.20 and 72,712.09
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Solution
The fourth proportional to 133,139.67, 183,734.20 and 72,712.09 is: 100,343.48
Step by Step Solution
- Step 1: Write the proportion equation
133,139.67 : 183,734.20 = 72,712.09 : x - Step 2: Convert to fraction form
133,139.67/183,734.20 = 72,712.09/x - Step 3: Cross multiply
133,139.67x = 183,734.20 × 72,712.09 - Step 4: Simplify right side
133,139.67x = 13,359,697,686.48 - Step 5: Solve for x
x = 13,359,697,686.48/133,139.67 - Step 6: Final answer
x = 100,343.48
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.