Finding the Fourth Proportional to 81,139.95, 121,623.66 and 47,875.68
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Solution
The fourth proportional to 81,139.95, 121,623.66 and 47,875.68 is: 71,762.62
Step by Step Solution
- Step 1: Write the proportion equation
81,139.95 : 121,623.66 = 47,875.68 : x - Step 2: Convert to fraction form
81,139.95/121,623.66 = 47,875.68/x - Step 3: Cross multiply
81,139.95x = 121,623.66 × 47,875.68 - Step 4: Simplify right side
81,139.95x = 5,822,815,426.59 - Step 5: Solve for x
x = 5,822,815,426.59/81,139.95 - Step 6: Final answer
x = 71,762.62
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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.