Finding the Fourth Proportional to 157,015.11, 235,465.68 and 85,990.53
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Solution
The fourth proportional to 157,015.11, 235,465.68 and 85,990.53 is: 128,954.59
Step by Step Solution
- Step 1: Write the proportion equation
157,015.11 : 235,465.68 = 85,990.53 : x - Step 2: Convert to fraction form
157,015.11/235,465.68 = 85,990.53/x - Step 3: Cross multiply
157,015.11x = 235,465.68 × 85,990.53 - Step 4: Simplify right side
157,015.11x = 20,247,818,620.01 - Step 5: Solve for x
x = 20,247,818,620.01/157,015.11 - Step 6: Final answer
x = 128,954.59
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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.