Finding the Fourth Proportional to 103,706.18, 142,813.35 and 90,087.99
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Solution
The fourth proportional to 103,706.18, 142,813.35 and 90,087.99 is: 124,059.80
Step by Step Solution
- Step 1: Write the proportion equation
103,706.18 : 142,813.35 = 90,087.99 : x - Step 2: Convert to fraction form
103,706.18/142,813.35 = 90,087.99/x - Step 3: Cross multiply
103,706.18x = 142,813.35 × 90,087.99 - Step 4: Simplify right side
103,706.18x = 12,865,767,646.67 - Step 5: Solve for x
x = 12,865,767,646.67/103,706.18 - Step 6: Final answer
x = 124,059.80
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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.