Finding the Fourth Proportional to 138,699.68, 191,405.36 and 75,037.36
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Solution
The fourth proportional to 138,699.68, 191,405.36 and 75,037.36 is: 103,551.45
Step by Step Solution
- Step 1: Write the proportion equation
138,699.68 : 191,405.36 = 75,037.36 : x - Step 2: Convert to fraction form
138,699.68/191,405.36 = 75,037.36/x - Step 3: Cross multiply
138,699.68x = 191,405.36 × 75,037.36 - Step 4: Simplify right side
138,699.68x = 14,362,552,904.25 - Step 5: Solve for x
x = 14,362,552,904.25/138,699.68 - Step 6: Final answer
x = 103,551.45
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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.