Finding the Fourth Proportional to 124,873,643.30, 172,321,886.69 and 69,121,348.97
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Solution
The fourth proportional to 124,873,643.30, 172,321,886.69 and 69,121,348.97 is: 95,385,390.79
Step by Step Solution
- Step 1: Write the proportion equation
124,873,643.30 : 172,321,886.69 = 69,121,348.97 : x - Step 2: Convert to fraction form
124,873,643.30/172,321,886.69 = 69,121,348.97/x - Step 3: Cross multiply
124,873,643.30x = 172,321,886.69 × 69,121,348.97 - Step 4: Simplify right side
124,873,643.30x = 11,911,121,265,068,288 - Step 5: Solve for x
x = 11,911,121,265,068,288/124,873,643.30 - Step 6: Final answer
x = 95,385,390.79
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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.