Finding the Fourth Proportional to 86,184,420.30, 129,276,630.45 and 78,248,234.70
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Solution
The fourth proportional to 86,184,420.30, 129,276,630.45 and 78,248,234.70 is: 117,372,352.05
Step by Step Solution
- Step 1: Write the proportion equation
86,184,420.30 : 129,276,630.45 = 78,248,234.70 : x - Step 2: Convert to fraction form
86,184,420.30/129,276,630.45 = 78,248,234.70/x - Step 3: Cross multiply
86,184,420.30x = 129,276,630.45 × 78,248,234.70 - Step 4: Simplify right side
86,184,420.30x = 10,115,668,120,676,768 - Step 5: Solve for x
x = 10,115,668,120,676,768/86,184,420.30 - Step 6: Final answer
x = 117,372,352.05
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.