Finding the Fourth Proportional to 128,353.08, 177,133.49 and 70,992.17
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Solution
The fourth proportional to 128,353.08, 177,133.49 and 70,992.17 is: 97,972.65
Step by Step Solution
- Step 1: Write the proportion equation
128,353.08 : 177,133.49 = 70,992.17 : x - Step 2: Convert to fraction form
128,353.08/177,133.49 = 70,992.17/x - Step 3: Cross multiply
128,353.08x = 177,133.49 × 70,992.17 - Step 4: Simplify right side
128,353.08x = 12,575,091,188.87 - Step 5: Solve for x
x = 12,575,091,188.87/128,353.08 - Step 6: Final answer
x = 97,972.65
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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.