Finding the Fourth Proportional to 145,998.95, 201,478.80 and 78,930.95
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Solution
The fourth proportional to 145,998.95, 201,478.80 and 78,930.95 is: 108,924.84
Step by Step Solution
- Step 1: Write the proportion equation
145,998.95 : 201,478.80 = 78,930.95 : x - Step 2: Convert to fraction form
145,998.95/201,478.80 = 78,930.95/x - Step 3: Cross multiply
145,998.95x = 201,478.80 × 78,930.95 - Step 4: Simplify right side
145,998.95x = 15,902,912,081.47 - Step 5: Solve for x
x = 15,902,912,081.47/145,998.95 - Step 6: Final answer
x = 108,924.84
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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.