Finding the Fourth Proportional to 103,703.18, 142,809.21 and 90,084.99
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Solution
The fourth proportional to 103,703.18, 142,809.21 and 90,084.99 is: 124,055.66
Step by Step Solution
- Step 1: Write the proportion equation
103,703.18 : 142,809.21 = 90,084.99 : x - Step 2: Convert to fraction form
103,703.18/142,809.21 = 90,084.99/x - Step 3: Cross multiply
103,703.18x = 142,809.21 × 90,084.99 - Step 4: Simplify right side
103,703.18x = 12,864,966,254.76 - Step 5: Solve for x
x = 12,864,966,254.76/103,703.18 - Step 6: Final answer
x = 124,055.66
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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.