Finding the Fourth Proportional to 139,945.68, 193,130.28 and 79,526.61
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Solution
The fourth proportional to 139,945.68, 193,130.28 and 79,526.61 is: 109,749.70
Step by Step Solution
- Step 1: Write the proportion equation
139,945.68 : 193,130.28 = 79,526.61 : x - Step 2: Convert to fraction form
139,945.68/193,130.28 = 79,526.61/x - Step 3: Cross multiply
139,945.68x = 193,130.28 × 79,526.61 - Step 4: Simplify right side
139,945.68x = 15,358,996,272.15 - Step 5: Solve for x
x = 15,358,996,272.15/139,945.68 - Step 6: Final answer
x = 109,749.70
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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.