Finding the Fourth Proportional to 140,138.86, 193,395.90 and 79,718.26
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Solution
The fourth proportional to 140,138.86, 193,395.90 and 79,718.26 is: 110,013.63
Step by Step Solution
- Step 1: Write the proportion equation
140,138.86 : 193,395.90 = 79,718.26 : x - Step 2: Convert to fraction form
140,138.86/193,395.90 = 79,718.26/x - Step 3: Cross multiply
140,138.86x = 193,395.90 × 79,718.26 - Step 4: Simplify right side
140,138.86x = 15,417,184,639.13 - Step 5: Solve for x
x = 15,417,184,639.13/140,138.86 - Step 6: Final answer
x = 110,013.63
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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.