Finding the Fourth Proportional to 138,395.61, 190,986.53 and 77,966.99
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Solution
The fourth proportional to 138,395.61, 190,986.53 and 77,966.99 is: 107,594.77
Step by Step Solution
- Step 1: Write the proportion equation
138,395.61 : 190,986.53 = 77,966.99 : x - Step 2: Convert to fraction form
138,395.61/190,986.53 = 77,966.99/x - Step 3: Cross multiply
138,395.61x = 190,986.53 × 77,966.99 - Step 4: Simplify right side
138,395.61x = 14,890,643,529.88 - Step 5: Solve for x
x = 14,890,643,529.88/138,395.61 - Step 6: Final answer
x = 107,594.77
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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.