Finding the Fourth Proportional to 99,138.41, 136,811.99 and 53,816.75
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Solution
The fourth proportional to 99,138.41, 136,811.99 and 53,816.75 is: 74,267.65
Step by Step Solution
- Step 1: Write the proportion equation
99,138.41 : 136,811.99 = 53,816.75 : x - Step 2: Convert to fraction form
99,138.41/136,811.99 = 53,816.75/x - Step 3: Cross multiply
99,138.41x = 136,811.99 × 53,816.75 - Step 4: Simplify right side
99,138.41x = 7,362,776,113.31 - Step 5: Solve for x
x = 7,362,776,113.31/99,138.41 - Step 6: Final answer
x = 74,267.65
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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.