Finding the Fourth Proportional to 138,995.21, 191,813.72 and 75,332.99
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Solution
The fourth proportional to 138,995.21, 191,813.72 and 75,332.99 is: 103,959.70
Step by Step Solution
- Step 1: Write the proportion equation
138,995.21 : 191,813.72 = 75,332.99 : x - Step 2: Convert to fraction form
138,995.21/191,813.72 = 75,332.99/x - Step 3: Cross multiply
138,995.21x = 191,813.72 × 75,332.99 - Step 4: Simplify right side
138,995.21x = 14,449,899,714.89 - Step 5: Solve for x
x = 14,449,899,714.89/138,995.21 - Step 6: Final answer
x = 103,959.70
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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.