Finding the Fourth Proportional to 84,378,118.65, 127,199,609.34 and 78,753,459.48
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Solution
The fourth proportional to 84,378,118.65, 127,199,609.34 and 78,753,459.48 is: 118,720,462.61
Step by Step Solution
- Step 1: Write the proportion equation
84,378,118.65 : 127,199,609.34 = 78,753,459.48 : x - Step 2: Convert to fraction form
84,378,118.65/127,199,609.34 = 78,753,459.48/x - Step 3: Cross multiply
84,378,118.65x = 127,199,609.34 × 78,753,459.48 - Step 4: Simplify right side
84,378,118.65x = 10,017,409,280,029,520 - Step 5: Solve for x
x = 10,017,409,280,029,520/84,378,118.65 - Step 6: Final answer
x = 118,720,462.61
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.