Finding the Fourth Proportional to 111,386.68, 153,721.76 and 63,638.99
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Solution
The fourth proportional to 111,386.68, 153,721.76 and 63,638.99 is: 87,826.46
Step by Step Solution
- Step 1: Write the proportion equation
111,386.68 : 153,721.76 = 63,638.99 : x - Step 2: Convert to fraction form
111,386.68/153,721.76 = 63,638.99/x - Step 3: Cross multiply
111,386.68x = 153,721.76 × 63,638.99 - Step 4: Simplify right side
111,386.68x = 9,782,697,229.23 - Step 5: Solve for x
x = 9,782,697,229.23/111,386.68 - Step 6: Final answer
x = 87,826.46
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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.