Finding the Fourth Proportional to 76,945.60, 115,209.96 and 39,931.84
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Solution
The fourth proportional to 76,945.60, 115,209.96 and 39,931.84 is: 59,789.59
Step by Step Solution
- Step 1: Write the proportion equation
76,945.60 : 115,209.96 = 39,931.84 : x - Step 2: Convert to fraction form
76,945.60/115,209.96 = 39,931.84/x - Step 3: Cross multiply
76,945.60x = 115,209.96 × 39,931.84 - Step 4: Simplify right side
76,945.60x = 4,600,545,689.13 - Step 5: Solve for x
x = 4,600,545,689.13/76,945.60 - Step 6: Final answer
x = 59,789.59
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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.