Finding the Fourth Proportional to 31,195,475.09, 43,035,248.68 and 20,185,778.78
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Solution
The fourth proportional to 31,195,475.09, 43,035,248.68 and 20,185,778.78 is: 27,846,987.65
Step by Step Solution
- Step 1: Write the proportion equation
31,195,475.09 : 43,035,248.68 = 20,185,778.78 : x - Step 2: Convert to fraction form
31,195,475.09/43,035,248.68 = 20,185,778.78/x - Step 3: Cross multiply
31,195,475.09x = 43,035,248.68 × 20,185,778.78 - Step 4: Simplify right side
31,195,475.09x = 868,700,009,381,590.75 - Step 5: Solve for x
x = 868,700,009,381,590.75/31,195,475.09 - Step 6: Final answer
x = 27,846,987.65
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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.