Finding the Fourth Proportional to 112,347,128.70, 168,520,693.05 and 78,306,911.10
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Solution
The fourth proportional to 112,347,128.70, 168,520,693.05 and 78,306,911.10 is: 117,460,366.65
Step by Step Solution
- Step 1: Write the proportion equation
112,347,128.70 : 168,520,693.05 = 78,306,911.10 : x - Step 2: Convert to fraction form
112,347,128.70/168,520,693.05 = 78,306,911.10/x - Step 3: Cross multiply
112,347,128.70x = 168,520,693.05 × 78,306,911.10 - Step 4: Simplify right side
112,347,128.70x = 13,196,334,929,176,738 - Step 5: Solve for x
x = 13,196,334,929,176,738/112,347,128.70 - Step 6: Final answer
x = 117,460,366.65
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1.5x scale
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.