Finding the Fourth Proportional to 85,887.30, 129,176.55 and 76,901.70
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Solution
The fourth proportional to 85,887.30, 129,176.55 and 76,901.70 is: 115,661.99
Step by Step Solution
- Step 1: Write the proportion equation
85,887.30 : 129,176.55 = 76,901.70 : x - Step 2: Convert to fraction form
85,887.30/129,176.55 = 76,901.70/x - Step 3: Cross multiply
85,887.30x = 129,176.55 × 76,901.70 - Step 4: Simplify right side
85,887.30x = 9,933,896,295.14 - Step 5: Solve for x
x = 9,933,896,295.14/85,887.30 - Step 6: Final answer
x = 115,661.99
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1.5x scale
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.