Finding the Fourth Proportional to 153,601,421.70, 211,990,699.52 and 86,634,126.08
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Solution
The fourth proportional to 153,601,421.70, 211,990,699.52 and 86,634,126.08 is: 119,566,790.37
Step by Step Solution
- Step 1: Write the proportion equation
153,601,421.70 : 211,990,699.52 = 86,634,126.08 : x - Step 2: Convert to fraction form
153,601,421.70/211,990,699.52 = 86,634,126.08/x - Step 3: Cross multiply
153,601,421.70x = 211,990,699.52 × 86,634,126.08 - Step 4: Simplify right side
153,601,421.70x = 18,365,628,988,509,952 - Step 5: Solve for x
x = 18,365,628,988,509,952/153,601,421.70 - Step 6: Final answer
x = 119,566,790.37
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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.