Finding the Fourth Proportional to 81,303.90, 121,957.99 and 22,140.78
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Solution
The fourth proportional to 81,303.90, 121,957.99 and 22,140.78 is: 33,211.75
Step by Step Solution
- Step 1: Write the proportion equation
81,303.90 : 121,957.99 = 22,140.78 : x - Step 2: Convert to fraction form
81,303.90/121,957.99 = 22,140.78/x - Step 3: Cross multiply
81,303.90x = 121,957.99 × 22,140.78 - Step 4: Simplify right side
81,303.90x = 2,700,245,025.83 - Step 5: Solve for x
x = 2,700,245,025.83/81,303.90 - Step 6: Final answer
x = 33,211.75
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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.