Finding the Fourth Proportional to 153,985.49, 212,478.97 and 85,993.79
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Solution
The fourth proportional to 153,985.49, 212,478.97 and 85,993.79 is: 118,659.71
Step by Step Solution
- Step 1: Write the proportion equation
153,985.49 : 212,478.97 = 85,993.79 : x - Step 2: Convert to fraction form
153,985.49/212,478.97 = 85,993.79/x - Step 3: Cross multiply
153,985.49x = 212,478.97 × 85,993.79 - Step 4: Simplify right side
153,985.49x = 18,271,872,241.81 - Step 5: Solve for x
x = 18,271,872,241.81/153,985.49 - Step 6: Final answer
x = 118,659.71
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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.