Finding the Fourth Proportional to 156,134,779.74, 215,467,279.74 and 86,521,323.15
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Solution
The fourth proportional to 156,134,779.74, 215,467,279.74 and 86,521,323.15 is: 119,400,137.30
Step by Step Solution
- Step 1: Write the proportion equation
156,134,779.74 : 215,467,279.74 = 86,521,323.15 : x - Step 2: Convert to fraction form
156,134,779.74/215,467,279.74 = 86,521,323.15/x - Step 3: Cross multiply
156,134,779.74x = 215,467,279.74 × 86,521,323.15 - Step 4: Simplify right side
156,134,779.74x = 18,642,514,138,635,992 - Step 5: Solve for x
x = 18,642,514,138,635,992/156,134,779.74 - Step 6: Final answer
x = 119,400,137.30
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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.