Finding the Fourth Proportional to 128,438,347.44, 177,245,383.50 and 69,700,999.80
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Solution
The fourth proportional to 128,438,347.44, 177,245,383.50 and 69,700,999.80 is: 96,187,631.55
Step by Step Solution
- Step 1: Write the proportion equation
128,438,347.44 : 177,245,383.50 = 69,700,999.80 : x - Step 2: Convert to fraction form
128,438,347.44/177,245,383.50 = 69,700,999.80/x - Step 3: Cross multiply
128,438,347.44x = 177,245,383.50 × 69,700,999.80 - Step 4: Simplify right side
128,438,347.44x = 12,354,180,439,884,422 - Step 5: Solve for x
x = 12,354,180,439,884,422/128,438,347.44 - Step 6: Final answer
x = 96,187,631.55
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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.