Finding the Fourth Proportional to 128,866.24, 177,777.13 and 83,555.70
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Solution
The fourth proportional to 128,866.24, 177,777.13 and 83,555.70 is: 115,269.08
Step by Step Solution
- Step 1: Write the proportion equation
128,866.24 : 177,777.13 = 83,555.70 : x - Step 2: Convert to fraction form
128,866.24/177,777.13 = 83,555.70/x - Step 3: Cross multiply
128,866.24x = 177,777.13 × 83,555.70 - Step 4: Simplify right side
128,866.24x = 14,854,292,822.25 - Step 5: Solve for x
x = 14,854,292,822.25/128,866.24 - Step 6: Final answer
x = 115,269.08
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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.