Finding the Fourth Proportional to 221,728.68, 305,985.06 and 121,127.40
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Solution
The fourth proportional to 221,728.68, 305,985.06 and 121,127.40 is: 167,155.53
Step by Step Solution
- Step 1: Write the proportion equation
221,728.68 : 305,985.06 = 121,127.40 : x - Step 2: Convert to fraction form
221,728.68/305,985.06 = 121,127.40/x - Step 3: Cross multiply
221,728.68x = 305,985.06 × 121,127.40 - Step 4: Simplify right side
221,728.68x = 37,063,174,756.64 - Step 5: Solve for x
x = 37,063,174,756.64/221,728.68 - Step 6: Final answer
x = 167,155.53
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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.