Finding the Fourth Proportional to 139,731.68, 192,856.28 and 79,307.98
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Solution
The fourth proportional to 139,731.68, 192,856.28 and 79,307.98 is: 109,460.09
Step by Step Solution
- Step 1: Write the proportion equation
139,731.68 : 192,856.28 = 79,307.98 : x - Step 2: Convert to fraction form
139,731.68/192,856.28 = 79,307.98/x - Step 3: Cross multiply
139,731.68x = 192,856.28 × 79,307.98 - Step 4: Simplify right side
139,731.68x = 15,295,041,997.11 - Step 5: Solve for x
x = 15,295,041,997.11/139,731.68 - Step 6: Final answer
x = 109,460.09
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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.