Finding the Fourth Proportional to 221,790.20, 306,070.47 and 121,188.20
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Solution
The fourth proportional to 221,790.20, 306,070.47 and 121,188.20 is: 167,239.71
Step by Step Solution
- Step 1: Write the proportion equation
221,790.20 : 306,070.47 = 121,188.20 : x - Step 2: Convert to fraction form
221,790.20/306,070.47 = 121,188.20/x - Step 3: Cross multiply
221,790.20x = 306,070.47 × 121,188.20 - Step 4: Simplify right side
221,790.20x = 37,092,127,802.10 - Step 5: Solve for x
x = 37,092,127,802.10/221,790.20 - Step 6: Final answer
x = 167,239.71
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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.