Finding the Fourth Proportional to 81,142.95, 121,628.16 and 47,878.68
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Solution
The fourth proportional to 81,142.95, 121,628.16 and 47,878.68 is: 71,767.12
Step by Step Solution
- Step 1: Write the proportion equation
81,142.95 : 121,628.16 = 47,878.68 : x - Step 2: Convert to fraction form
81,142.95/121,628.16 = 47,878.68/x - Step 3: Cross multiply
81,142.95x = 121,628.16 × 47,878.68 - Step 4: Simplify right side
81,142.95x = 5,823,395,751.63 - Step 5: Solve for x
x = 5,823,395,751.63/81,142.95 - Step 6: Final answer
x = 71,767.12
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.