Finding the Fourth Proportional to 139,398.70, 192,358.26 and 77,311.19
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Solution
The fourth proportional to 139,398.70, 192,358.26 and 77,311.19 is: 106,682.82
Step by Step Solution
- Step 1: Write the proportion equation
139,398.70 : 192,358.26 = 77,311.19 : x - Step 2: Convert to fraction form
139,398.70/192,358.26 = 77,311.19/x - Step 3: Cross multiply
139,398.70x = 192,358.26 × 77,311.19 - Step 4: Simplify right side
139,398.70x = 14,871,445,986.93 - Step 5: Solve for x
x = 14,871,445,986.93/139,398.70 - Step 6: Final answer
x = 106,682.82
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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.