Finding the Fourth Proportional to 102,455.57, 141,380.07 and 57,129.99
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Solution
The fourth proportional to 102,455.57, 141,380.07 and 57,129.99 is: 78,834.59
Step by Step Solution
- Step 1: Write the proportion equation
102,455.57 : 141,380.07 = 57,129.99 : x - Step 2: Convert to fraction form
102,455.57/141,380.07 = 57,129.99/x - Step 3: Cross multiply
102,455.57x = 141,380.07 × 57,129.99 - Step 4: Simplify right side
102,455.57x = 8,077,041,985.30 - Step 5: Solve for x
x = 8,077,041,985.30/102,455.57 - Step 6: Final answer
x = 78,834.59
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1.5x scale
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.