Finding the Fourth Proportional to 81,289.99, 121,973.86 and 28,724.23
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Solution
The fourth proportional to 81,289.99, 121,973.86 and 28,724.23 is: 43,100.08
Step by Step Solution
- Step 1: Write the proportion equation
81,289.99 : 121,973.86 = 28,724.23 : x - Step 2: Convert to fraction form
81,289.99/121,973.86 = 28,724.23/x - Step 3: Cross multiply
81,289.99x = 121,973.86 × 28,724.23 - Step 4: Simplify right side
81,289.99x = 3,503,604,598.76 - Step 5: Solve for x
x = 3,503,604,598.76/81,289.99 - Step 6: Final answer
x = 43,100.08
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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.