Finding the Fourth Proportional to 128,023.39, 191,939.95 and 61,400.08
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Solution
The fourth proportional to 128,023.39, 191,939.95 and 61,400.08 is: 92,054.49
Step by Step Solution
- Step 1: Write the proportion equation
128,023.39 : 191,939.95 = 61,400.08 : x - Step 2: Convert to fraction form
128,023.39/191,939.95 = 61,400.08/x - Step 3: Cross multiply
128,023.39x = 191,939.95 × 61,400.08 - Step 4: Simplify right side
128,023.39x = 11,785,128,285.20 - Step 5: Solve for x
x = 11,785,128,285.20/128,023.39 - Step 6: Final answer
x = 92,054.49
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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.