Finding the Fourth Proportional to 90,902.05, 125,438.42 and 56,908.98
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Solution
The fourth proportional to 90,902.05, 125,438.42 and 56,908.98 is: 78,530.38
Step by Step Solution
- Step 1: Write the proportion equation
90,902.05 : 125,438.42 = 56,908.98 : x - Step 2: Convert to fraction form
90,902.05/125,438.42 = 56,908.98/x - Step 3: Cross multiply
90,902.05x = 125,438.42 × 56,908.98 - Step 4: Simplify right side
90,902.05x = 7,138,572,677.28 - Step 5: Solve for x
x = 7,138,572,677.28/90,902.05 - Step 6: Final answer
x = 78,530.38
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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.