Finding the Fourth Proportional to 149,259.12, 205,974.62 and 81,276.90
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Solution
The fourth proportional to 149,259.12, 205,974.62 and 81,276.90 is: 112,160.50
Step by Step Solution
- Step 1: Write the proportion equation
149,259.12 : 205,974.62 = 81,276.90 : x - Step 2: Convert to fraction form
149,259.12/205,974.62 = 81,276.90/x - Step 3: Cross multiply
149,259.12x = 205,974.62 × 81,276.90 - Step 4: Simplify right side
149,259.12x = 16,740,977,562.40 - Step 5: Solve for x
x = 16,740,977,562.40/149,259.12 - Step 6: Final answer
x = 112,160.50
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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.